Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1982_18_3_a15, author = {N. D. Vasilevich}, title = {Linear {Pfaffian} equations}, journal = {Differencialʹnye uravneni\^a}, pages = {520--523}, publisher = {mathdoc}, volume = {18}, number = {3}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1982_18_3_a15/} }
N. D. Vasilevich. Linear Pfaffian equations. Differencialʹnye uravneniâ, Tome 18 (1982) no. 3, pp. 520-523. http://geodesic.mathdoc.fr/item/DE_1982_18_3_a15/