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@article{DE_1968_4_12_a12, author = {P. E. Sobolevskii}, title = {A certain type of differential equations in a {Banach} space}, journal = {Differencialʹnye uravneni\^a}, pages = {2278--2280}, publisher = {mathdoc}, volume = {4}, number = {12}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_12_a12/} }
P. E. Sobolevskii. A certain type of differential equations in a Banach space. Differencialʹnye uravneniâ, Tome 4 (1968) no. 12, pp. 2278-2280. http://geodesic.mathdoc.fr/item/DE_1968_4_12_a12/