Guillermo Martínez-Silva Francisco Rodríguez-Henríquez Nareli Cruz Cortés Levent Ertaul On the Generation of X.509v3 Certificates with Biometric Information. 52-57 2007 conf/csreaSAM/2007 Security and Management db/conf/csreaSAM/csreaSAM2007.html#Martinez-SilvaRCE07