Year of Publication: 1981

Asveld, Peter R.J. and Engelfriet, Joost (1981) A Note on Non-Generators of Full AFL's. [Report]

Florisson, O. and Mul de, F.F.M. and Winter de, H.G. (1981) A Raman anemometer for component-selective velocity measurements of particles in a flow. Journal of Physics E: Scientific Instruments, 14 . pp. 1445-1446. ISSN 0022-3735

Sluijter, F.W. and Wijngaarden van, L. and Broer, L.J.F. (1981) A brief summary of L.J.F. Broer's work up till his retirement. Applied scientific research, 37 (1-2). pp. 5-19. ISSN 0003-6994

Alblas, Henk (1981) A characterization of attribute evaluation in passes. Acta informatica, 16 (4). pp. 427-464. ISSN 0001-5903

Rip, Arie (1981) A cognitive approach to science policy. Research Policy, 10 (4). pp. 294-311. ISSN 0048-7333

Maaren van, H. (1981) A degree theorem and decision methods for algebras of affine forms. Indagationes Mathematicae A: Mathematical sciences, 84 (3). pp. 315-324. ISSN 0023-3358

Kwakernaak, Huibert (1981) A minimum principle for stochastic control problems with output feedback. Systems & Control Letters, 1 (1). pp. 74-77. ISSN 0167-6911

Reinhoudt, D.N. and Hertog den, H.J. and Jong de, F. (1981) A nesting conformation of the 5′-bromo-1′,3′-xylyl-18-crown-5·tert-butylammonium hexafluorophosphate complex; the correlation of the structures of crown ether complexes in the solid state and in solution. Tetrahedron Letters, 22 (8). pp. 2513-2516. ISSN 0040-4039

Leij van der, M. and Oosterink, H.J. and Hall, R.H. and Reinhoudt, D.N. (1981) A novel synthesis of 2'-hydroxy-1',3'-xylyl crown ethers. Tetrahedron, 37 (21). pp. 3661-3666. ISSN 0040-4020

Kate ten, Herman H.J. and Bunk, Paul B. and Steffens, Harry A. and Klundert van de, Louis J.M. (1981) A thermally switched 9 kA superconducting rectifier fluxpump. IEEE Transactions on Magnetics, 17 (5). pp. 2067-2070. ISSN 0018-9464

Engelfriet, Joost and Rozenberg, Grzegorz (1981) A translational theorem for the class of EOL languages. Information and Control, 50 (2). pp. 175-183. ISSN 0019-9958

Valk, M. (1981) Acoustic power measurements of oscillating flames. Combustion and Flame, 41 . pp. 251-260. ISSN 0010-2180

Chamuleau, R.A.F.M. and Dupont, A. and Brugman, A.M. and Koning de, H.W.M. (1981) Activated charcoal and ammonium production. The Lancet (British ed.), 318 (8247). pp. 633-634. ISSN 0140-6736

Oda, O. and Hanekamp, L.J. and Bootsma, G.A. (1981) An AES and LEED study of carbon and oxygen sorption on copper surfaces. Applications of Surface Science, 7 (3). pp. 206-214. ISSN 0378-5963

Ommen van, J.G. and Rens van, J.G.M. and Gellings, P.J. (1981) An NMR and ESR-investigation of the catalytic system Ni(acac)2, C3H4, (i-Bu)3Al for the polymerization of propadiene. Journal of Molecular Catalysis, 13 (3). pp. 313-321. ISSN 0304-5102

Tanenbaum, Andrew S. and Mullender, Sape J. (1981) An overview of the Amoeba distributed operating system. ACM SIGOPS Operating Systems Review, 15 (3). pp. 51-64. ISSN 01635980

Sederel, L.C. and Does van der, L. and Duijl van, J.F. and Beugeling, T. and Bantjes, A. (1981) Anticoagulant activity of a synthetic heparinoid in relation to molecular weight and N-sulfate content. Journal of Biomedical Materials Research, 15 (6). pp. 819-827. ISSN 0021-9304

Fluitman, Jan H. (1981) Applicability of the planar Hall effect. Journal of Applied Physics, 52 . pp. 2468-2470. ISSN 0021-8979

Schreuder, J.A.M. (1981) Application of a location model to fire stations in Rotterdam. European Journal of Operational Research, 6 (2). pp. 212-219. ISSN 0377-2217

Groesen van, E.W.C. (1981) Bifurcating electric wires. Applied scientific research, 37 (1-2). pp. 53-65. ISSN 0003-6994

Melis, P. (1981) Book review: Operations research techniques for management / by Herbert Moskowitz and Gordon P. Wright. - Englewood Cliffs, NJ : Prentice-Hall, 1979. - 793 p. European Journal of Operational Research, 8 (2). p. 198. ISSN 0377-2217

Evers, J.J.M. (1981) Book review: Set valued dynamical systems and economic flow / [by Louis J. Cherene]. - Berlin, Springer, 1979. - ISBN 0-387-08847-4 (Lecture Notes in Economics and Mathematical Systems ; 158). European Journal of Operational Research, 8 (3). pp. 310-312. ISSN 0377-2217

Brack, A. (1981) Book review: consumer legislation in the Netherlands / by E.H. Hondius, ISBN: 0442304242. Common Market Law Review, 18 (295). pp. 238-240. ISSN 0165-0750

Wallinga-de Jonge, W. and Boom, H.B.K. and Heijink, R.J. and Vliet van der, G.H. (1981) Calcium model for mammalian skeletal muscle. Medical and biological engineering and computing, 19 (6). pp. 734-748. ISSN 0140-0118

Bootsma, G.A. (1981) Characterization of interfaces. Sensors and Actuators, 1 . pp. 289-303. ISSN 0250-6874

Pennings, M.L.M. and Reinhoudt, D.N. (1981) Chemistry of 4-membered cyclic nitrones (2, 3-dihydroazete 1-oxides); a novel one-step synthesis of N-acetoxy β-latams. Tetrahedron Letters, 22 (12). pp. 1153-1156. ISSN 0040-4039

Westerterp, K.R. (1981) Closing address Introduce or develop further the new energy technologies? Resources and Conservation, 7 . pp. 387-392. ISSN 0166-3097

Wielinga, T. and Lodder, J.C. (1981) Co-Cr films for perpendicular recording. IEEE Transactions on Magnetics, 17 (6). pp. 3178-3180. ISSN 0018-9464

Fluitman, J.H.J. and Groenland, J.P.J. (1981) Comparison of a shielded "One-sided" planar hall-transducer with an MR-head. IEEE Transactions on Magnetics, 17 (6). pp. 2893-2895. ISSN 0018-9464

Gijsbertse, E.A. and Klundert van de, L.J.M. (1981) Conductivity measurements with trapezoidal a.c. magnetic fields. Physica B+C, 103 (2-3). pp. 315-323. ISSN 0378-4363

Berg van den, J.W.A. and Ridder van de, G. and Smolders, C.A. (1981) Conformational behaviour of poly(2,6-dimethyl-1,4-phenylene oxide) in solution - I: Intrinsic viscosity as a function of temperature. European Polymer Journal, 17 (8). pp. 935-939. ISSN 0014-3057

Hoede, C. and Veldman, H.J. (1981) Contraction theorems in Hamiltonian graph theory. Discrete Mathematics, 34 (1). pp. 61-67. ISSN 0012-365X

Kate ten, Herman H.J. and Kamphuis, Dick A. and Caspari, Meindert and Klundert van de, Louis J.M. and Houkes, Zweitze (1981) Control system for a superconducting rectifier using a microcomputer. IEEE Transactions on Magnetics, 17 (5). pp. 2063-2066. ISSN 0018-9464

Jong de, Ton (1981) Correctievoorschriften voor de beoordeling van open vragen en interbeoordelaarsbetrouwbaarheid. Tijdschrift voor Onderwijsresearch, 6 (5). pp. 217-230. ISSN 0166-591X

Jongschaap, R.J.J. (1981) Derivation of the Marrucci model from transient-network theory. Journal of Non-Newtonian Fluid Mechanics, 8 (3-4). pp. 183-190. ISSN 0377-0257

Meijer, J. and Bruin de, W. (1981) Determination of flatness from straightness measurements and characterization of the surface by four parameters. Precision Engineering, 3 (1). pp. 17-22. ISSN 0141-6359

Visser, Richard and Hovestad, Adrie (1981) Determination of the total sulphur content in gas oils with a flame photometric detector. Journal of Chromatography, 204 . pp. 153-157. ISSN 0021-9673

Coolen, H.C.C.H. and Rijckevorsel, J.L.A. (1981) Dutch law and order mentality in the seventies. Erasmus Univ., Subfaculteit der Sociaal-Culturele Wetenschappen, Afdeling AOA, Rotterdam.

Moss, Grant and Feil, Dirk (1981) Electrostatic Molecular Interaction from X-ray Diffraction Data. I. Development of the Method; Test on Pyrazine. Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography, 37 (3). pp. 414-421. ISSN 0567-7394

Zijlstra, P.A. and Beenakker, C.I.M. (1981) Evaluation of Silicon-Chemiluminescence Monitoring as a Novel Method for Atomic Fluorine Determination and End Point Detection in Plasma Etch Systems. Applied Spectroscopy, 35 (4). pp. 413-417. ISSN 0003-7028

Verhagen, L.H.J.M. (1981) Experiments with bar graph process supervision displays on VDUs. Applied Ergonomics, 12 (1). pp. 39-45. ISSN 0003-6870

Gijsbertse, E.A. and Sikkenga, J. and Klundert van de, L.J.M. (1981) Flux penetration and a.c. losses in type II superconductors: I. Model calculations. Physica B+C, 106 (1). pp. 59-67. ISSN 0378-4363

Bokhorst, H. and Altena, F.W. and Smolders, C.A. (1981) Formation of asymmetric cellulose acetate membranes. Desalination, 38 . pp. 349-360. ISSN 0011-9164

Heringa, J.R. and Wiegel, F.W. and Beckum van, F.P.H. (1981) Friction coefficient of a disk in a sheet of viscous fluid: numerical calculation. Physica A: Theoretical and statistical physics, 108 (2-3). pp. 598-604. ISSN 0378-4371

Klundert van de, L.J.M. and Kate ten, H.H.J. (1981) Fully superconducting rectifiers and fluxpumps Part 1: Realized methods for pumping flux. Cryogenics, 21 (4). pp. 195-206. ISSN 0011-2275

Swaaij van, W.P.M. (1981) Gasification — the process and the technology. Resources and Conservation, 7 . pp. 337-349. ISSN 0166-3097

Dijk van, T. and Burggraaf, A.J. (1981) Grain boundary effects on ionic conductivity in ceramic GdxZr1-xO2-(x/2) solid solutions. Physica Status Solidi A: Applied research, 63 (14). pp. 229-240. ISSN 0031-8965

Verkerk, M.J. and Burggraaf, A.J. (1981) High Oxygen Ion Conduction in Sintered Oxides of the System. Journal of the Electrochemical Society, 128 (1). pp. 75-82. ISSN 0013-4651

Kate ten, H.H.J. and Bunk, P.B. and Britton, R.B. and Klundert van de, L.J.M. (1981) High current and high power superconducting rectifiers. Cryogenics, 21 (5). pp. 291-269. ISSN 0011-2275

Verkerk, M.J. and Burggraaf, A.J. (1981) High oxygen ion conduction in sintered oxides of the Bi2O3---Ln2O3 system. Solid State Ionics, 3-4 . pp. 463-467. ISSN 0167-2738

Waterman, H.A. and Makh, S.S. (1981) Inertia effects in rheometrical flow systems Part 3: Some energy considerations with respect to the flow field in the balance rheometer. Rheologica acta, 20 (5). pp. 471-477. ISSN 0035-4511

Eggen, A.Th.J. and Eijk van der, C. and Niemoller, B., eds. (1981) Kiezen in Nederland : 26 mei 1981 : wat de kiezers deden en waarom. Actaboek, Zoetermeer. ISBN 9789065670533

Oosterbroek, M. and Mellema, J. (1981) Linear viscoelasticity of emulsions : I. The effect of an interfacial film on the dynamic viscosity of nondilute emulsions. Journal of Colloid and Interface Science, 84 (1-5). pp. 14-26. ISSN 0021-9797

Oosterbroek, M. and Mellema, J. and Lopulissa, J.S. (1981) Linear viscoelasticity of emulsions : II. Measurements of the linear viscoelastic behavior of emulsions in the kilohertz range. Journal of Colloid and Interface Science, 84 (1). pp. 27-35. ISSN 0021-9797

Bagchi, Arunabha and Olsder, Geert Jan (1981) Linear-quadratic stochastic pursuit-evasion games. Applied mathematics and optimization, 7 (19). pp. 95-123. ISSN 0095-4616

Mettes, C.T.C.W. and Pilot, A. and Roossink, H.J. (1981) Linking factual and procedural knowledge in solving science problems: A case study in a thermodynamics course. Instructional science, 10 (4). pp. 333-361. ISSN 0020-4277

Broek van den, P.M. (1981) Lower bounds for the ground state energy of spin systems. Physics Letters A, 81 (2-3). pp. 185-186. ISSN 0375-9601

Duijvestijn, A.J.W. and Leeuw, P. (1981) Lowest order squared rectangles and squares with the largest element not on the boundary. Mathematics of Computation, 37 (155). pp. 223-228. ISSN 0025-5718

Druyvesteyn, W.F. and Raemaekers, E.L.M. and Verhaar, R.D.J. and Wilde de, J. and Fluitman, J.H.J. and Groenland, J.P.J. (1981) Magnetic behaviour of narrow track thin-film heads. Journal of Applied Physics, 52 (3). pp. 2462-2464. ISSN 0021-8979

Groenland, J.P.J. and Fluitman, J.H.J. (1981) Measurement system for two-dimensional magnetic field distributions, applied to the investigation of recording head fields. Journal of Physics E: Scientific Instruments, 14 (4). p. 503. ISSN 0022-3735

Beukema, G.J. and Mellema, J. (1981) Measuring system for complex shear modulus of liquids using torsionally vibrating quartz crystals. Journal of Physics E: Scientific Instruments, 14 (4). p. 418. ISSN 0022-3735

Friedrichsen, Willy and Schmidt, Regine and Hummel van, Gerrit J. and Ham van den, D.M.W. (1981) Mesoionische Sechsringheterocyclen, III Reaktionen o-chinoider Verbindungen mit 6-Oxo-6H-1,3-diazin-1-ium-4-olaten. Liebigs Annalen der Chemie, 1981 (3). pp. 521-531. ISSN 0170-2041

Bos, M. (1981) Microprocessors in laboratory automation. Naturwissenschaften, 68 (1). pp. 14-19. ISSN 0028-1042

Bron, C. (1981) Modules program structures and the structuring of operating systems. In: 3rd Conference of the European Cooperation in Informatics, October 20-22, 1981, Munich, Germany.

Gijsbertse, E.A. and Klundert van de, L.J.M. and Rij van, M.L.D. and Weezep van, W.J. (1981) Non-isothermal flux penetration in type II superconductors. Cryogenics, 21 (7). pp. 419-425. ISSN 0011-2275

Kals, H.J.J. (1981) On Measurement and Interpretation of Toughness Behaviour of Carbide Tools. CIRP Annals, 30 (1). pp. 37-42. ISSN 0007-8506

Klundert van de, L.J.M. and Kate ten, H.H.J. (1981) On fully superconducting rectifiers and fluxpumps. A review. Part 2: Commutation modes, characteristics and switches. Cryogenics, 21 (5). pp. 267-277. ISSN 0011-2275

Rademacher, F.J.C. (1981) On possible flow back in vertical screw conveyors for cohesionless granular materials. Journal of Agricultural Engineering Research, 26 (3). pp. 225-250. ISSN 0021-8634

Rademacher, F.J.C. (1981) On seed damage in grain augers. Journal of Agricultural Engineering Research, 26 (1). pp. 87-96. ISSN 0021-8634

Fluitman, J.H.J. (1981) On the calculation of the response of (planar) hall-effect devices to inhomogeneous magnetic fields. Sensors and Actuators, 2 . pp. 155-170. ISSN 0250-6874

Hettich, R. and Jongen, H.Th. (1981) On the local continuity of the Chebyshev operator. Journal of Approximation Theory, 33 (4). pp. 296-307. ISSN 0021-9045

Basar, T. (1981) On the saddle-point solution of a class of stochastic differential games. Journal of optimization theory and applications, 33 (4). pp. 539-556. ISSN 0022-3239

Doorn van, Erik A. (1981) On the time dependent behaviour of the truncated birth-death process. Stochastic Processes and Their Applications, 11 (3). pp. 261-271. ISSN 0304-4149

Boroske, E. and Elwenspoek, M. and Helfrich, W. (1981) Osmotic shrinkage of giant egg-lecithin vesicles. Biophysical Journal, 34 (1). pp. 95-109. ISSN 0006-3495

Nijholt, Anton (1981) Parsing strategies: a concise survey. In: Mathematical Foundations of Computer Science, 31 August - 4 September 1981, Štrbské Pleso, Czechoslovakia.

Overweg, J.A. and Flokstra, J. and Brake ter, H.J.M. and Gerritsma, G.J. (1981) Partial lattice participation in the spin-lattice relaxation of potassium chromium alum. Physica B+C, 107 (1-3). pp. 363-364. ISSN 0378-4363

Engelfriet, Joost and Filè, Gilberto (1981) Passes and paths of attribute grammars. Information and Control, 49 (2). pp. 125-169. ISSN 0019-9958

Wiegel, F.W. (1981) Path integrals with topological constraints: Aharonov-Bohm effect and polymer entanglements. Physica A: Theoretical and statistical physics, 109 (3). pp. 609-617. ISSN 0378-4371

Altena, F.W. and Smolders, C.A. (1981) Phase separation phenomena in solutions of cellulose acetate. I. Differential scanning calorimetry of cellulose acetate in mixtures of dioxane and water. Journal of Polymer Science: Polymer symposia, 69 (1). pp. 1-10. ISSN 0360-8905

Bos, M. and Boerema, A. (1981) Phenetic distances in the Drosophila melanogaster-subgroup species and oviposition-site preference for food components. Genetica, 56 (3). pp. 175-183. ISSN 0016-6707

Kuipers, J.A.M. and Lammerink, B.H.M. and Still, I.W.J. and Zwanenburg, B. (1981) Phosphorus Pentasulfide and Thiophosphoryl Bromide: Facile Reagents for the Reduction of Sulfines to Thiones. Synthesis, 1981 (4). pp. 295-297. ISSN 0039-7881

Schippers, J.C. and Hanemaayer, J.H. and Smolders, C.A. and Kostense, A. (1981) Predicting flux decline of reverse osmosis membranes. Desalination, 38 . pp. 339-348. ISSN 0011-9164

Bagchi, A. and Olsder, G.J. and Strijbos, R.C.W. (1981) Regional allocation of investment as a hierarchical optimization problem. Regional Science and Urban Economics, 11 (2). pp. 205-213. ISSN 0166-0462

Waal van de, B.W. (1981) Significance of calculated cluster conformations of benzene: comment on a publication by D. E. Williams. Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography, 37 . pp. 762-764. ISSN 0567-7394

Bruin de, W. and Meijer, J. (1981) Some results of flatness measurement. Precision Engineering, 3 (1). pp. 23-26. ISSN 0141-6359

Bagchi, A. and Basar, T. (1981) Stackelberg strategies in linear-quadratic stochastic differential games. Journal of optimization theory and applications, 35 (3). pp. 443-464. ISSN 0022-3239

Witteman, W.J. (1981) Steady-state model for the electron beam pumped KrF laser. Applied scientific research, 37 (1-2). pp. 195-208. ISSN 0003-6994

Burggraaf, A.J. and Dijk van, T. and Verkerk, M.J. (1981) Structure and conductivity of pyrochlore and fluorite type solid solutions. Solid State Ionics, 5 . pp. 519-522. ISSN 0167-2738

Verboom, W. and Visser, G.W. and Trompenaars, W.P. and Reinhoudt, D.N. and Harkema, S. and Hummel van, G.J. (1981) Synthesis of pyrrolizines by intramolecular capture of 1,4-dipolar intermediates in reactions of enamines with dimethyl acetylenedicarboxylate. Tetrahedron, 37 (20). pp. 3525-3533. ISSN 0040-4020

Niederer, H.H.J.M. and Matthey, A.P.M. and Sparnaay, M.J. (1981) Temperature dependent metallic conductance above the mobility edge of a silicon inversion layer. Journal of Physics C: Solid state physics, 14 (28). p. 4167. ISSN 0022-3719

Houten van, F.J.A.M. and Kals, H.J.J. (1981) The Development of a Technological Processor as a Part of a Workpiece Programming System. CIRP Annals, 30 (1). pp. 363-368. ISSN 0007-8506

LeDuc, Lawrence (1981) The Dynamic Properties of Party Identification: a Four-Nation Comparison. European Journal of Political Research, 9 (3). pp. 257-268. ISSN 0304-4130

Nawijn, W.M. and Jonge de, R. (1981) The analysis of a conveyor-serviced production station. European Journal of Operational Research, 6 (1). pp. 67-74. ISSN 0377-2217

Nijholt, A. (1981) The equivalence problem for LL- and LR-regular grammars. In: Fundamentals of Computation Theory, 24-28 August 1981, Szeged, Hungary.

Engelfriet, Joost and Filè, Gilberto (1981) The formal power of one-visit attribute grammars. Acta Informatica, 16 (3). pp. 275-302. ISSN 0001-5903

Bergveld, P. and Rooij de, N.F. (1981) The history of chemically sensitive semiconductor devices. Sensors and Actuators, 1 . pp. 5-15. ISSN 0250-6874

Martens, J.W.D. and Bogert van den, W.F. and Silfhout van, A. (1981) The influence of argon ion bombardment on the electrical and optical properties of clean silicon surfaces. Surface Science, 105 (1). pp. 275-288. ISSN 0039-6028

Mellenbergh, Gideon J. and Linden van der, Wim J. (1981) The linear utility model for optimal selection. Psychometrika, 46 (3). pp. 283-293. ISSN 0033-3123

Ingen Housz, J.F. and Meijer, H.E.H. (1981) The melting performance of single screw extruders. Polymer Engineering and Science, 21 (6). pp. 352-359. ISSN 0032-3888

Ingen Housz, J.F. and Meijer, H.E.H. (1981) The melting performance of single screw extruders. II. Polymer Engineering and Science, 21 (17). pp. 1156-1161. ISSN 0032-3888

Duijvestijn, A.J.W. and Federico, P.J. (1981) The number of polyhedral (3-connected planar) graphs. Mathematics of Computation, 37 (156). pp. 523-532. ISSN 0025-5718

Bergveld, P. (1981) The operation of an ISFET as an electronic device. Sensors and Actuators, 1 . pp. 17-29. ISSN 0250-6874

Nag, N.K. and Fransen, T. and Mars, P. (1981) The oxidation of toluene on various molybdenum-containing catalysts. Journal of Catalysis, 68 (1). pp. 77-85. ISSN 0021-9517

Bootsma, G.A. and Rooij de, N.F. and Silfhout van, A. (1981) The solid/liquid interface. Sensors and Actuators, 1 . pp. 111-136. ISSN 0250-6874

Niederer, H.H.J.M. and Mattey, A.P.M. and Sparnaay, M.J. (1981) Thermally activated conductance of a silicon inversion layer by electrons excited above the mobility edge. Journal of Physics C: Solid state physics, 14 (28). p. 4177. ISSN 0022-3719

Asveld, Peter R.J. (1981) Time and Space Complexity of Inside-Out Macro Languages. International Journal of Computer Mathematics, 10 (1). pp. 3-14. ISSN 0020-7160

Mars, N.J.I. and Arragon van, G.W. (1981) Time delay estimation in nonlinear systems. IEEE Transactions on Acoustics, Speech, and Signal Processing, 29 (3). pp. 619-621. ISSN 0096-3518

Gijsbertse, E.A. and Caspari, M. and Klundert van de, L.J.M. (1981) Trapezoidal ac magnetic fields: a powerful technique for the investigation of type 11 superconductors. Cryogenics, 21 (5). pp. 299-311. ISSN 0011-2275

Linden van der, Wim J. (1981) Using aptitude measurements for the optimal assignment of subjects to treatments with and without mastery scores. Psychometrika, 46 (3). pp. 257-274. ISSN 0033-3123

Roozeboom, Fred and Cordingley, Peter D. and Gellings, Paul J. (1981) Vanadium oxide monolayer catalysts : The vapor-phase oxidation of methanol. Journal of Catalysis, 68 (2). pp. 464-472. ISSN 0021-9517

Groenland, J.P.J. (1981) Visuele informatie-overdracht tussen 'mens' en 'machine'. De Ingenieur, 1998 (41). pp. 6-10. ISSN 0020-1146