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• Volume 30

Author: Kratochvíl, Jan

• Kratochvíl, Jan; Matoušek, Jiří: NP-hardness results for intersection graphs. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 4, pp. 761-773
• Kratochvíl, Jan: Perfect codes and two-graphs. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 4, pp. 755-760
• Kratochvíl, Jan: Perfect codes in graphs and their Cartesian powers [Abstract of thesis]. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 1, pp. 193-194