@article{1250126641,
author = {Gardener, R.B. and Shadwick, W.F.},
title = {A simple characterization of the contact system on $J^k(E)$},
journal = {Rocky Mountain J. Math.},
volume = {17},
number = {4},
year = {1987},
pages = { 19-22},
language = {en},
url = {http://dml.mathdoc.fr/item/1250126641}
}
Gardener, R.B.; Shadwick, W.F. A simple characterization of the contact system on $J^k(E)$. Rocky Mountain J. Math., Tome 17 (1987) no. 4, pp. 19-22. http://gdmltest.u-ga.fr/item/1250126641/