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Additional information
Joint Institute for Nuclear Research, Dubna. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 45, No. 2, pp. 251–260, November, 1980.
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Moshchinskii, B.V., Rodrigues, C. & Fedyanin, V.K. Generating functional and the functional analog of Bogolyubov's variational method. Theor Math Phys 45, 1010–1016 (1980). https://doi.org/10.1007/BF01028599
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DOI: https://doi.org/10.1007/BF01028599