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Author: Tkáč, Michal

• Tkáč, Michal: On longest circuits in certain non-regular planar graphs. (English). Mathematica Slovaca, vol. 45 (1995), issue 3, pp. 235-242
• Tkáč, Michal: Simple 3-polytopal graphs with edges of only two types and shortness coefficients. (English). Mathematica Slovaca, vol. 42 (1992), issue 2, pp. 147-152