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@article{IVM_1962_4_a17, author = {R. A. Spasskii}, title = {On an indirect control system}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {146--151}, publisher = {mathdoc}, number = {4}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1962_4_a17/} }
R. A. Spasskii. On an indirect control system. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1962), pp. 146-151. http://geodesic.mathdoc.fr/item/IVM_1962_4_a17/