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@article{IVM_1964_1_a11, author = {I. V. Livartovskii}, title = {A generalization of the second method of {Lyapunov}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {87--95}, publisher = {mathdoc}, number = {1}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1964_1_a11/} }
I. V. Livartovskii. A generalization of the second method of Lyapunov. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1964), pp. 87-95. http://geodesic.mathdoc.fr/item/IVM_1964_1_a11/