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@article{DE_1971_7_5_a2, author = {S. T. Zavalishchin}, title = {On the question of the general form of a linear {equation.~I,} {II}}, journal = {Differencialʹnye uravneni\^a}, pages = {791--797}, publisher = {mathdoc}, volume = {7}, number = {5}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_5_a2/} }
S. T. Zavalishchin. On the question of the general form of a linear equation.~I, II. Differencialʹnye uravneniâ, Tome 7 (1971) no. 5, pp. 791-797. http://geodesic.mathdoc.fr/item/DE_1971_7_5_a2/