James Skelley Robert Fischer Arup Sarma Bernd Heisele Recognizing Expressions in a New Database Containing Played and Natural Expressions. 1220-1225 2006 conf/icpr/2006 ICPR (1) http://doi.ieeecomputersociety.org/10.1109/ICPR.2006.975 db/conf/icpr/icpr2006-1.html#SkelleyFSH06