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Moscow State University. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 64, No. 1, pp. 163–170, July, 1985.
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Vedyaev, A.V., Ivanov, V.A. & Shilov, V.E. On a possibility of using generalized Okubo operators to take into account correlations in the Hubbard model with degeneracy. Theor Math Phys 64, 756–761 (1985). https://doi.org/10.1007/BF01017043
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DOI: https://doi.org/10.1007/BF01017043