You seem to be attempting to access an item that has been removed from the repository.
The item you are trying to access was a duplicate of:
Kalker, Ton and Epema, Dick H.J. and Hartel, Pieter H. and Lagendijk, R. (Inald) L. and Steen, Maarten van (2004) Music2Share - Copyright-Compliant Music Sharing in P2P Systems (Invited paper). Proceedings of the IEEE Special Issue on Digital Rights Management, 92 (6). pp. 961-970. ISSN 0018-9219