@article{1183505100, author = {Kasner, Edward and DeCicco, John}, title = {The geometry of velocity systems}, journal = {Bull. Amer. Math. Soc.}, volume = {49}, number = {12}, year = {1943}, pages = { 236-245}, language = {en}, url = {http://dml.mathdoc.fr/item/1183505100} }
Kasner, Edward; DeCicco, John. The geometry of velocity systems. Bull. Amer. Math. Soc., Tome 49 (1943) no. 12, pp. 236-245. http://gdmltest.u-ga.fr/item/1183505100/