@article{1256052613, author = {Dennin, Joseph B.}, title = {Fields of modular functions of genus $0$}, journal = {Illinois J. Math.}, volume = {15}, number = {4}, year = {1971}, pages = { 442-455}, language = {en}, url = {http://dml.mathdoc.fr/item/1256052613} }
Dennin, Joseph B. Fields of modular functions of genus $0$. Illinois J. Math., Tome 15 (1971) no. 4, pp. 442-455. http://gdmltest.u-ga.fr/item/1256052613/