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Additional information
V. A. Steklov Mathematics Institute, Academy of Sciences of the USSR. Translated from Funktsional'nyi Analiz i Ego Prilozheniya, Vol. 25, No. 2, pp. 1–12, April–June, 1991.
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Arnol'd, V.I. Topological and ergodic properties of closed 1-forms with incommensurable periods. Funct Anal Its Appl 25, 81–90 (1991). https://doi.org/10.1007/BF01079587
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DOI: https://doi.org/10.1007/BF01079587