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Author: Pondělíček, Bedřich

• Pondělíček, Bedřich: Tolerance distributive and tolerance Boolean varieties of semigroups. (English). Czechoslovak Mathematical Journal, vol. 36 (1986), issue 4, pp. 617-622
• Pondělíček, Bedřich: Tolerance distributive and tolerance modular varieties of commutative semigroups. (English). Czechoslovak Mathematical Journal, vol. 36 (1986), issue 3, pp. 485-488