@article{GDZPPN00233321X,
title = {Classes caract\'eristiques isotropes.},
journal = {Mathematische Annalen},
volume = {283},
year = {1989},
pages = {343-352},
zbl = {0662.55009},
url = {http://dml.mathdoc.fr/item/GDZPPN00233321X}
}
Lalonde, Francois. Classes caractéristiques isotropes.. Mathematische Annalen, Tome 283 (1989) pp. 343-352. http://gdmltest.u-ga.fr/item/GDZPPN00233321X/