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@article{DAN_1957_114_1_a1, author = {V. G. Egorov}, title = {The stability of the solutions of periodical systems of total differential equations}, journal = {Doklady Akademii Nauk}, pages = {11--13}, publisher = {mathdoc}, volume = {114}, number = {1}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_1_a1/} }
V. G. Egorov. The stability of the solutions of periodical systems of total differential equations. Doklady Akademii Nauk, Tome 114 (1957) no. 1, pp. 11-13. http://geodesic.mathdoc.fr/item/DAN_1957_114_1_a1/