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@article{DE_1969_5_3_a3, author = {V. P. Glushko}, title = {Degenerate linear differential equations. {III}}, journal = {Differencialʹnye uravneni\^a}, pages = {443--455}, publisher = {mathdoc}, volume = {5}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_3_a3/} }
V. P. Glushko. Degenerate linear differential equations. III. Differencialʹnye uravneniâ, Tome 5 (1969) no. 3, pp. 443-455. http://geodesic.mathdoc.fr/item/DE_1969_5_3_a3/