@article{1183503567, author = {John, Fritz}, title = {Discontinuous convex solutions of difference equations}, journal = {Bull. Amer. Math. Soc.}, volume = {47}, number = {11}, year = {1941}, pages = { 275-281}, language = {en}, url = {http://dml.mathdoc.fr/item/1183503567} }
John, Fritz. Discontinuous convex solutions of difference equations. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 275-281. http://gdmltest.u-ga.fr/item/1183503567/