@article{1183419267, author = {Bliss, G. A.}, title = {The construction of a field of extremals about a given point}, journal = {Bull. Amer. Math. Soc.}, volume = {14}, number = {3}, year = {1907}, pages = { 321-324}, language = {en}, url = {http://dml.mathdoc.fr/item/1183419267} }
Bliss, G. A. The construction of a field of extremals about a given point. Bull. Amer. Math. Soc., Tome 14 (1907) no. 3, pp. 321-324. http://gdmltest.u-ga.fr/item/1183419267/