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@article{IVM_1978_1_a6, author = {V. M. Marchenko}, title = {Controllability of systems with lag}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {54--65}, publisher = {mathdoc}, number = {1}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1978_1_a6/} }
V. M. Marchenko. Controllability of systems with lag. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1978), pp. 54-65. http://geodesic.mathdoc.fr/item/IVM_1978_1_a6/