@article{1183505309, author = {Bell, P. O.}, title = {New systems of hypergeodesics defined on a surface}, journal = {Bull. Amer. Math. Soc.}, volume = {49}, number = {12}, year = {1943}, pages = { 575-580}, language = {en}, url = {http://dml.mathdoc.fr/item/1183505309} }
Bell, P. O. New systems of hypergeodesics defined on a surface. Bull. Amer. Math. Soc., Tome 49 (1943) no. 12, pp. 575-580. http://gdmltest.u-ga.fr/item/1183505309/