Author: Pondělíček, Bedřich

Pondělíček, Bedřich: Commutative semigroups whose lattice of tolerances is Boolean. (English). Czechoslovak Mathematical Journal, vol. 38 (1988), issue 2, pp. 226-230
Pondělíček, Bedřich: Direct decomposability of tolerances and congruences on semigroups. (English). Czechoslovak Mathematical Journal, vol. 38 (1988), issue 4, pp. 701-704

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