@inproceedings{JJ98,
 author    = {Markus Jakobsson and Ari Juels},
 title     = {X-Cash: Executable Digital Cash},
 booktitle = {FC '98: Proceedings of the Second International Conference on Financial Cryptography},
 year      = {1998},
 isbn      = {3-540-64951-4},
 pages     = {16--27},
 note      = {LNCS 1465}, 
 publisher = {Springer-Verlag},
 address   = {London, UK},
 }