1. S. Brands An efficient off-line electronic cash system based on the representation problem. In 246. Centrum voor Wiskunde en Informatica (CWI), ISSN 0169-118X, December 31 1993. AA (Department of Algorithmics and Architecture), CS-R9323, URL=
http://ftp.cwi.nl/pub/CWIreports/AA/CS-R9323.ps.Z
.
2. Lect Notes Comput Sci;S. Brands,1993
3. Ernie Brickell, Peter Gemmell, and David Kravitz Trustee-based tracing extensions to anonymous cash and the making of anonymous change. In Proceedings of the Sixth Annual ACM-SIAM Symposium on Discrete Algorithms (SODA’95), pages 457–466. Sandia National Labs, January 1995.
4. Lect Notes Comput Sci;J. Camenisch,1996
5. Lect Notes Comput Sci;D. Chaum,1992