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@article{DAN_1967_176_4_a8, author = {A. Yu. Levin}, title = {Passage to the limit for nonsingular systems $\dot{X}=A_n(t)X$}, journal = {Doklady Akademii Nauk}, pages = {774--777}, publisher = {mathdoc}, volume = {176}, number = {4}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_4_a8/} }
A. Yu. Levin. Passage to the limit for nonsingular systems $\dot{X}=A_n(t)X$. Doklady Akademii Nauk, Tome 176 (1967) no. 4, pp. 774-777. http://geodesic.mathdoc.fr/item/DAN_1967_176_4_a8/