Louisa Lam Qizhi Xu Ching Y. Suen Differentiation between Alphabetic and Numeric Data Using NN Ensembles. 40-43 2002 ICPR (4) http://doi.ieeecomputersociety.org/10.1109/ICPR.2002.1047395 db/conf/icpr/icpr2002-4.html#LamXS02