@article{1183513735,
author = {Gonz\'alez, Mario O.},
title = {On the solution of ordinary differential equations of the first order invariant under contact transformations},
journal = {Bull. Amer. Math. Soc.},
volume = {55},
number = {12},
year = {1949},
pages = { 355-362},
language = {en},
url = {http://dml.mathdoc.fr/item/1183513735}
}
González, Mario O. On the solution of ordinary differential equations of the first order invariant under contact transformations. Bull. Amer. Math. Soc., Tome 55 (1949) no. 12, pp. 355-362. http://gdmltest.u-ga.fr/item/1183513735/