Author: Schwarz, Štefan
- : On a sharp estimation in the theory of binary relations on a finite set. (English). Czechoslovak Mathematical Journal, vol. 20 (1970), issue 4, pp. 703-714
- : On idempotent binary relations on a finite set. (English). Czechoslovak Mathematical Journal, vol. 20 (1970), issue 4, pp. 696-702
- : On the semigroup of binary relations on a finite set. (English). Czechoslovak Mathematical Journal, vol. 20 (1970), issue 4, pp. 632-679
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