@article{1183415368, author = {Lovett, Edgar Odell}, title = {Note on contact transformations}, journal = {Bull. Amer. Math. Soc.}, volume = {4}, number = {8}, year = {1898}, pages = { 402-404}, language = {en}, url = {http://dml.mathdoc.fr/item/1183415368} }
Lovett, Edgar Odell. Note on contact transformations. Bull. Amer. Math. Soc., Tome 4 (1898) no. 8, pp. 402-404. http://gdmltest.u-ga.fr/item/1183415368/