Author: Tomczak, Karolina
- : On some properties of the Picard operators. (English). Archivum Mathematicum, vol. 45 (2009), issue 2, pp. 125-135
- : On approximation of functions by certain operators preserving $x^2$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 49 (2008), issue 4, pp. 579-593
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