Rempulska, Lucyna; Skorupka, Mariola On the degree of approximation of functions of two variables by some operators. (English) Zbl 1095.41016 Acta Comment. Univ. Tartu. Math. 9, 51-64 (2005). Reviewer: Włodzimierz Łenski (Poznań) MSC: 41A36 41A25 PDFBibTeX XMLCite \textit{L. Rempulska} and \textit{M. Skorupka}, Acta Comment. Univ. Tartu. Math. 9, 51--64 (2005; Zbl 1095.41016)
Rempulska, Lucyna; Skorupka, Mariola Approximation by Kantorovich type operators. (English) Zbl 1149.41300 Acta Comment. Univ. Tartu. Math. 7, 57-70 (2003). MSC: 41A36 41A25 41A35 PDFBibTeX XMLCite \textit{L. Rempulska} and \textit{M. Skorupka}, Acta Comment. Univ. Tartu. Math. 7, 57--70 (2003; Zbl 1149.41300)