Matan, Ofer; Baird, Henry S.; Bromley, Jane M.; Burges, Christopher J. C.; Denker, John S.; Jackel, Lawrence D.; Le Cun, Yann ; Pednault, Edwin P. D.; Satterfield, William D.; Stenard, Charles E. and Thompson, Timothy J.
(1992).
Reading handwritten digits: a ZIP code recognition system.Computer, 25(7)
pp. 59–63.