Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1985_21_6_a20, author = {I. V. Gaishun and N. A. Portyanko}, title = {Regular multidimensional differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1071--1073}, publisher = {mathdoc}, volume = {21}, number = {6}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_6_a20/} }
I. V. Gaishun; N. A. Portyanko. Regular multidimensional differential equations. Differencialʹnye uravneniâ, Tome 21 (1985) no. 6, pp. 1071-1073. http://geodesic.mathdoc.fr/item/DE_1985_21_6_a20/