Karthik Nandakumar Yi Chen Sarat C. Dass Anil K. Jain Likelihood Ratio-Based Biometric Score Fusion. 342-347 2008 30 IEEE Trans. Pattern Anal. Mach. Intell. 2 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2007.70796 db/journals/pami/pami30.html#NandakumarCDJ08