@article{1183529098, author = {Ullman, J. L.}, title = {A problem of Schmidt and Spitzer}, journal = {Bull. Amer. Math. Soc.}, volume = {73}, number = {6}, year = {1967}, pages = { 883-885}, language = {en}, url = {http://dml.mathdoc.fr/item/1183529098} }
Ullman, J. L. A problem of Schmidt and Spitzer. Bull. Amer. Math. Soc., Tome 73 (1967) no. 6, pp. 883-885. http://gdmltest.u-ga.fr/item/1183529098/