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@article{IVM_1962_4_a20, author = {G. I. Trushin}, title = {A $\lambda $-conjugate system}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {161--169}, publisher = {mathdoc}, number = {4}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1962_4_a20/} }
G. I. Trushin. A $\lambda $-conjugate system. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1962), pp. 161-169. http://geodesic.mathdoc.fr/item/IVM_1962_4_a20/