@article{1138843144,
author = {Saito, Toshiya},
title = {Differential equations with invariant Pfaffian forms},
journal = {Kodai Math. Sem. Rep.},
volume = {3},
number = {1-2},
year = {1951},
pages = { 103-117},
language = {en},
url = {http://dml.mathdoc.fr/item/1138843144}
}
Saito, Toshiya. Differential equations with invariant Pfaffian forms. Kodai Math. Sem. Rep., Tome 3 (1951) no. 1-2, pp. 103-117. http://gdmltest.u-ga.fr/item/1138843144/