@article{1183420247, author = {Bill, E. Gordon}, title = {The construction of a space field of extremals}, journal = {Bull. Amer. Math. Soc.}, volume = {16}, number = {3}, year = {1909}, pages = { 374-378}, language = {en}, url = {http://dml.mathdoc.fr/item/1183420247} }
Bill, E. Gordon. The construction of a space field of extremals. Bull. Amer. Math. Soc., Tome 16 (1909) no. 3, pp. 374-378. http://gdmltest.u-ga.fr/item/1183420247/