@article{1183525377, author = {Lewittes, Joseph}, title = {Gaps at Weierstrass points for the modular group}, journal = {Bull. Amer. Math. Soc.}, volume = {69}, number = {4}, year = {1963}, pages = { 578-582}, language = {en}, url = {http://dml.mathdoc.fr/item/1183525377} }
Lewittes, Joseph. Gaps at Weierstrass points for the modular group. Bull. Amer. Math. Soc., Tome 69 (1963) no. 4, pp. 578-582. http://gdmltest.u-ga.fr/item/1183525377/