Zhongkang Lu Zheru Chi Wan-Chi Siu Extraction and Optimization of B-Spline PBD Templates for Recognition of Connected Handwritten Digit Strings. 132-139 2002 24 IEEE Trans. Pattern Anal. Mach. Intell. 1 http://computer.org/tpami/tp2002/i0132abs.htm db/journals/pami/pami24.html#LuCS02