K. Roy Tandra Pal Umapada Pal Fumitaka Kimura Oriya Handwritten Numeral Recognition Syste. 770-774 2005 conf/icdar/2005 ICDAR http://doi.ieeecomputersociety.org/10.1109/ICDAR.2005.183 db/conf/icdar/icdar2005.html#RoyPPK05