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@article{DE_1965_1_4_a6, author = {N. A. Izobov}, title = {On a set of lower indices of a linear differential system}, journal = {Differencialʹnye uravneni\^a}, pages = {469--477}, publisher = {mathdoc}, volume = {1}, number = {4}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1965_1_4_a6/} }
N. A. Izobov. On a set of lower indices of a linear differential system. Differencialʹnye uravneniâ, Tome 1 (1965) no. 4, pp. 469-477. http://geodesic.mathdoc.fr/item/DE_1965_1_4_a6/