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@article{DE_1974_10_2_a10, author = {Yu. B. Syroid}, title = {Triangular and triangularizable differential systems}, journal = {Differencialʹnye uravneni\^a}, pages = {265--269}, publisher = {mathdoc}, volume = {10}, number = {2}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1974_10_2_a10/} }
Yu. B. Syroid. Triangular and triangularizable differential systems. Differencialʹnye uravneniâ, Tome 10 (1974) no. 2, pp. 265-269. http://geodesic.mathdoc.fr/item/DE_1974_10_2_a10/