@article{1183423670, author = {Nelson, Alfred L.}, title = {Quasi-periodicity of asymptotic plane nets}, journal = {Bull. Amer. Math. Soc.}, volume = {23}, number = {2}, year = {1916}, pages = { 445-455}, language = {en}, url = {http://dml.mathdoc.fr/item/1183423670} }
Nelson, Alfred L. Quasi-periodicity of asymptotic plane nets. Bull. Amer. Math. Soc., Tome 23 (1916) no. 2, pp. 445-455. http://gdmltest.u-ga.fr/item/1183423670/