@article{1183497367, author = {Ritt, J. F.}, title = {Algebraic difference equations}, journal = {Bull. Amer. Math. Soc.}, volume = {40}, number = {12}, year = {1934}, pages = { 303-308}, language = {en}, url = {http://dml.mathdoc.fr/item/1183497367} }
Ritt, J. F. Algebraic difference equations. Bull. Amer. Math. Soc., Tome 40 (1934) no. 12, pp. 303-308. http://gdmltest.u-ga.fr/item/1183497367/