@article{05555869,
title = {A first order },
journal = {SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]},
volume = {5},
year = {2009},
doi = {10.3842/SIGMA.2009.041},
zbl = {1163.33320},
language = {en},
url = {http://dml.mathdoc.fr/item/05555869}
}
Ito, Masahiko. A first order . SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only], Tome 5 (2009) . doi : 10.3842/SIGMA.2009.041. http://gdmltest.u-ga.fr/item/05555869/