@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/