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@article{DE_1987_23_9_a12, author = {V. K. Romanko}, title = {Systems of operator-differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1574--1585}, publisher = {mathdoc}, volume = {23}, number = {9}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_9_a12/} }
V. K. Romanko. Systems of operator-differential equations. Differencialʹnye uravneniâ, Tome 23 (1987) no. 9, pp. 1574-1585. http://geodesic.mathdoc.fr/item/DE_1987_23_9_a12/