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@article{IVM_1975_5_a12, author = {G. S. Yudaev}, title = {The conditional stability of countable systems of differential equations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {87--92}, publisher = {mathdoc}, number = {5}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1975_5_a12/} }
G. S. Yudaev. The conditional stability of countable systems of differential equations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1975), pp. 87-92. http://geodesic.mathdoc.fr/item/IVM_1975_5_a12/