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Author: Pupka, Krzysztof

• Pupka, Krzysztof: Fixed points of periodic and firmly lipschitzian mappings in Banach spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 53 (2012), issue 4, pp. 573-579
• Górnicki, Jarosław; Pupka, Krzysztof: Fixed point theorems for $n$-periodic mappings in Banach spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 46 (2005), issue 1, pp. 33-42