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@article{IVM_1987_4_a16, author = {M. A. Zaretskaya}, title = {The joint spectrum of a~system of commuting quadratic quantum {Hamiltonians}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {80--82}, publisher = {mathdoc}, number = {4}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1987_4_a16/} }
M. A. Zaretskaya. The joint spectrum of a~system of commuting quadratic quantum Hamiltonians. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1987), pp. 80-82. http://geodesic.mathdoc.fr/item/IVM_1987_4_a16/