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Author: Konieczny, Janusz

• Konieczny, Janusz: Regular, inverse, and completely regular centralizers of permutations. (English). Mathematica Bohemica, vol. 128 (2003), issue 2, pp. 179-186
• Konieczny, Janusz: Second centralizers of partial transformations. (English). Czechoslovak Mathematical Journal, vol. 51 (2001), issue 4, pp. 873-888