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Translated from Matematicheskie Zametki, Vol. 38, No. 2, pp. 310–316, August, 1985.
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Degtev, A.N. Semilattices of disjunctive and linear degrees. Mathematical Notes of the Academy of Sciences of the USSR 38, 681–684 (1985). https://doi.org/10.1007/BF01156253
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DOI: https://doi.org/10.1007/BF01156253