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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 17, No. 1, pp. 200–215, January–February, 1976.
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Shubin, M.A. Theorems on the coincidence of the spectra of pseudodifferential almost-periodic operators in the spaces L2(Rn) and B2(Rn). Sib Math J 17, 158–170 (1976). https://doi.org/10.1007/BF00969301
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DOI: https://doi.org/10.1007/BF00969301