Wenju Liu Yun Tang Shouye Peng Fast and robust stochastic segment model for Mandarin digital string recognition. 1445-1449 2008 IJCNN http://dx.doi.org/10.1109/IJCNN.2008.4633987 conf/ijcnn/2008 db/conf/ijcnn/ijcnn2008.html#LiuTP08