Celeste Campo Andrés Marín López Arturo García Ignacio Díaz Peter T. Breuer Carlos Delgado Kloos Carlos García JCCM: Flexible Certificates for Smartcards with Java Card. 34-42 2001 conf/esmart/2001 E-smart http://link.springer.de/link/service/series/0558/bibs/2140/21400034.htm db/conf/esmart/esmart2001.html#CampoMGDBDG01