@article{1178243674,
author = {Sasaki, Shigeo},
title = {A characterization of contact transformations},
journal = {Tohoku Math. J. (2)},
volume = {16},
number = {4},
year = {1964},
pages = { 285-290},
language = {en},
url = {http://dml.mathdoc.fr/item/1178243674}
}
Sasaki, Shigeo. A characterization of contact transformations. Tohoku Math. J. (2), Tome 16 (1964) no. 4, pp. 285-290. http://gdmltest.u-ga.fr/item/1178243674/