Yann LeCun Sumit Chopra Marc'Aurelio Ranzato Fu Jie Huang Energy-Based Models in Document Recognition and Computer Vision. 337-341 2007 conf/icdar/2007 ICDAR http://doi.ieeecomputersociety.org/10.1109/ICDAR.2007.107 db/conf/icdar/icdar2007.html#LeCunCRH07