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Author: Zelinka, Bohdan

• Zelinka, Bohdan: Tolerance relations on semilattices. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 2, pp. 333-338
• Zelinka, Bohdan: Tolerance graphs. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 1, pp. 121-131