Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1968_4_9_a3, author = {V. P. Glushko}, title = {Degenerate linear differential equations. {I}}, journal = {Differencialʹnye uravneni\^a}, pages = {1584--1597}, publisher = {mathdoc}, volume = {4}, number = {9}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_9_a3/} }
V. P. Glushko. Degenerate linear differential equations. I. Differencialʹnye uravneniâ, Tome 4 (1968) no. 9, pp. 1584-1597. http://geodesic.mathdoc.fr/item/DE_1968_4_9_a3/