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Translated from Matematicheskie Zametki, Vol. 53, No. 3, pp. 156–158, March, 1993.
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Lyubishkin, V.A. The regularized trace of a two-dimensional oscillator. Math Notes 53, 354–356 (1993). https://doi.org/10.1007/BF01207727
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DOI: https://doi.org/10.1007/BF01207727