Mildrey Carbonell Joaquín Torres Márquez Antonio Izquierdo Diego Suarez New E-Payment Scenarios in an Extended Version of the Traditional Model. 514-525 2008 ICCSA (2) http://dx.doi.org/10.1007/978-3-540-69848-7_42 conf/iccsa/2008-2 db/conf/iccsa/iccsa2008-2.html#CarbonellTIS08