@article{1255631812, author = {Estermann, T.}, title = {Another proof that bounded modular functions are constants}, journal = {Illinois J. Math.}, volume = {6}, number = {1}, year = {1962}, pages = { 128-130}, language = {en}, url = {http://dml.mathdoc.fr/item/1255631812} }
Estermann, T. Another proof that bounded modular functions are constants. Illinois J. Math., Tome 6 (1962) no. 1, pp. 128-130. http://gdmltest.u-ga.fr/item/1255631812/