@article{1183414981, author = {Lovett, Edgar Odell}, title = {Lie's Geometry of Contact Transformations}, journal = {Bull. Amer. Math. Soc.}, volume = {4}, number = {3}, year = {1897}, pages = { 321-350}, language = {en}, url = {http://dml.mathdoc.fr/item/1183414981} }
Lovett, Edgar Odell. Lie's Geometry of Contact Transformations. Bull. Amer. Math. Soc., Tome 4 (1897) no. 3, pp. 321-350. http://gdmltest.u-ga.fr/item/1183414981/