@article{1183416910, author = {Eisenhart, L. P.}, title = {Lines of length zero on surfaces}, journal = {Bull. Amer. Math. Soc.}, volume = {9}, number = {3}, year = {1902}, pages = { 241-243}, language = {en}, url = {http://dml.mathdoc.fr/item/1183416910} }
Eisenhart, L. P. Lines of length zero on surfaces. Bull. Amer. Math. Soc., Tome 9 (1902) no. 3, pp. 241-243. http://gdmltest.u-ga.fr/item/1183416910/