Tolerance relations on periodic commutative semigroups
Bohdan Zelinka (1977)
Czechoslovak Mathematical Journal
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Bohdan Zelinka (1977)
Czechoslovak Mathematical Journal
Similarity:
Bedřich Pondělíček (1986)
Czechoslovak Mathematical Journal
Similarity:
Bedřich Pondělíček (1978)
Czechoslovak Mathematical Journal
Similarity: