Massimo Tistarelli Enrico Grosso Josef Bigün C. Sacerdoti José Santos-Victor David Vernon The VIRSBS Project: Visual Intelligent Recognition for Secure Banking Services. 727-734 1997 conf/iciap/1997-2 ICIAP (2) db/conf/iciap/iciap1997-2.html#TistarelliGBSSV97 http://dx.doi.org/10.1007/3-540-63508-4_189