Weiqiang Kong Kazuhiro Ogata Kokichi Futatsugi Algebraic Approaches to Formal Analysis of the Mondex Electronic Purse System. 393-412 2007 conf/ifm/2007 IFM http://dx.doi.org/10.1007/978-3-540-73210-5_21 db/conf/ifm/ifm2007.html#KongOF07