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@article{DE_1977_13_4_a0, author = {A. D. Avdeev}, title = {Second order matrix differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {579--591}, publisher = {mathdoc}, volume = {13}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1977_13_4_a0/} }
A. D. Avdeev. Second order matrix differential equations. Differencialʹnye uravneniâ, Tome 13 (1977) no. 4, pp. 579-591. http://geodesic.mathdoc.fr/item/DE_1977_13_4_a0/