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@article{DE_1987_23_3_a6, author = {B. S. Kalitin}, title = {On a comparison method for a problem of stability of periodic systems}, journal = {Differencialʹnye uravneni\^a}, pages = {423--428}, publisher = {mathdoc}, volume = {23}, number = {3}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_3_a6/} }
B. S. Kalitin. On a comparison method for a problem of stability of periodic systems. Differencialʹnye uravneniâ, Tome 23 (1987) no. 3, pp. 423-428. http://geodesic.mathdoc.fr/item/DE_1987_23_3_a6/