Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1993_29_1_a19, author = {V. Ya. Yakubov}, title = {A {Dirac-type} system with variable coefficients}, journal = {Differencialʹnye uravneni\^a}, pages = {156--164}, publisher = {mathdoc}, volume = {29}, number = {1}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_1_a19/} }
V. Ya. Yakubov. A Dirac-type system with variable coefficients. Differencialʹnye uravneniâ, Tome 29 (1993) no. 1, pp. 156-164. http://geodesic.mathdoc.fr/item/DE_1993_29_1_a19/