@article{1102994510,
author = {Johnson, H. H.},
title = {An algebraic approach to exterior differential systems.},
journal = {Pacific J. Math.},
volume = {19},
number = {3},
year = {1966},
pages = { 423-434},
language = {en},
url = {http://dml.mathdoc.fr/item/1102994510}
}
Johnson, H. H. An algebraic approach to exterior differential systems.. Pacific J. Math., Tome 19 (1966) no. 3, pp. 423-434. http://gdmltest.u-ga.fr/item/1102994510/