@CONFERENCE\{IMM2006-04919,
    author       = "C. W. George and A. E. Haxthausen",
    title        = "Specification and Proof of the Mondex Electronic Purse",
    year         = "2006",
    booktitle    = "Proceedings of Automated Formal Methods 2006 ({AFM} 2006), Seattle",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/4919-full.html"
}