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• Acta Universitatis Carolinae. Mathematica et Physica

Author: Gagola, Stephen III,

• Gagola, Stephen III,; Kepka, Tomáš: Transitive closures of binary relations. IV. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 53 (2012), issue 2, pp. 47-60