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Translated from Matematicheski Zametki, Vol. 50, No. 2, pp. 146–151, August, 1991.
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Tsatsulin, M.I. Morse inequalities for almost-periodic functions. Mathematical Notes of the Academy of Sciences of the USSR 50, 872–875 (1991). https://doi.org/10.1007/BF01157578
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DOI: https://doi.org/10.1007/BF01157578