Geodesic
Commutative semigroups whose lattice of tolerances is Boolean
Czechoslovak Mathematical Journal, Tome 38 (1988) no. 2, pp. 226-230

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MR Zbl
DOI : 10.21136/CMJ.1988.102216
Classification : 06B10, 20M14 
Pondělíček, Bedřich. Commutative semigroups whose lattice of tolerances is Boolean. Czechoslovak Mathematical Journal, Tome 38 (1988) no. 2, pp. 226-230. doi: 10.21136/CMJ.1988.102216
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