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• Niederle, Josef: Conditions for transitive principal tolerances. (English). Czechoslovak Mathematical Journal, vol. 39 (1989), issue 2, pp. 380-381
• Chajda, Ivan; Zelinka, Bohdan: Tolerances and congruences on implication algebras. (English). Czechoslovak Mathematical Journal, vol. 38 (1988), issue 2, pp. 207-217
• Chajda, Ivan; Zelinka, Bohdan: A characterization of tolerance-distributive tree semilattices. (English). Czechoslovak Mathematical Journal, vol. 37 (1987), issue 2, pp. 175-180
• Zelinka, Bohdan: Tolerances on graph algebras. (English). Czechoslovak Mathematical Journal, vol. 37 (1987), issue 2, pp. 313-317
• Loganathan, M.: On tolerance relations. (English). Czechoslovak Mathematical Journal, vol. 36 (1986), issue 4, pp. 662-667
• Pondělíček, Bedřich: Tolerance distributive and tolerance Boolean varieties of semigroups. (English). Czechoslovak Mathematical Journal, vol. 36 (1986), issue 4, pp. 617-622
• Janowitz, Melvin F.: Tolerances and congruences on lattices. (English). Czechoslovak Mathematical Journal, vol. 36 (1986), issue 1, pp. 108-115
• Bromek, Tadeusz; Moszyńska, Maria; Prażmowski, Krzysztof: Concerning basic notions of the measurement theory. (English). Czechoslovak Mathematical Journal, vol. 34 (1984), issue 4, pp. 570-587
• Jendroľ, Stanislav; Ryjáček, Zdeněk: 3-polytopes of constant tolerance of edges. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 4, pp. 843-850
• Pondělíček, Bedřich: On representations of tolerance ordered commutative semigroups. (English). Czechoslovak Mathematical Journal, vol. 31 (1981), issue 1, pp. 153-158
• Drbohlav, K.: Remarks on tolerance algebras. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 22 (1981), issue 1, pp. 11-16