Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1985_21_1_a24, author = {Kh. R. Shukurov}, title = {Boundary value problems for a degenerate system of first-order equations}, journal = {Differencialʹnye uravneni\^a}, pages = {166--169}, publisher = {mathdoc}, volume = {21}, number = {1}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_1_a24/} }
Kh. R. Shukurov. Boundary value problems for a degenerate system of first-order equations. Differencialʹnye uravneniâ, Tome 21 (1985) no. 1, pp. 166-169. http://geodesic.mathdoc.fr/item/DE_1985_21_1_a24/