1. Schantz, Herbert F. (1982). The history of OCR, optical character recognition. [Manchester Center,Vt.]: Recognition Technologies Users Association. ISBN 9780943072012.
2. LeCun, Yann; Léon Bottou; Yoshua Bengio; Patrick Haffner (1998). "Gradient-based learning applied to document recognition" (PDF). Proceedings of the IEEE. 86 (11): 2278-2324. doi:10.1109/5.726791. Retrieved October 7, 2016.
3. "Shift-invariant pattern recognition neural network and its optical architecture;Zhang;Proceedings of annual conference of the Japan Society of Applied Physics,1988
4. "Parallel distributed processing model with local space-invariant interconnections and its optical architecture";Zhang;Applied Optics,1990
5. Szegedy, Christian; Liu, Wei; Jia, Yangqing; Sermanet, Pierre; Reed, Scott; Anguelov, Dragomir; Erhan, Dumitru; Vanhoucke, Vincent; Rabinovich, Andrew (2014). "Going Deeper with Convolutions." arXiv:1409.4842.