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This research was accomplished with the financial support of the CONACyT MEXICO Foundation, grant No. 920322.
Moscow Institute of Electronics and Mathematics. Translated from Matematicheskie Zametki, Vol. 56, No. 6, pp. 27–39, December, 1994.
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Belov, V.V., Kondrat'eva, M.F. Hamiltonian systems of equations for quantum means. Math Notes 56, 1228–1237 (1994). https://doi.org/10.1007/BF02266690
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DOI: https://doi.org/10.1007/BF02266690