Ba-Quy Vuong Yulan He Siu Cheung Hui Towards a web-based progressive handwriting recognition environment for mathematical problem solving. 886-893 2010 37 Expert Syst. Appl. 1 http://dx.doi.org/10.1016/j.eswa.2009.05.091 db/journals/eswa/eswa37.html#VuongHH10