Li, Song The direct and inverse theorems for multidimensional Bernstein-Kantorovich operators in \(C(S)\). (Chinese. English summary) Zbl 0909.47026 Acta Math. Sci. (Chin. Ed.) 17, No. 3, 285-293 (1997). MSC: 47B38 47A58 41A36 PDFBibTeX XMLCite \textit{S. Li}, Acta Math. Sci. (Chin. Ed.) 17, No. 3, 285--293 (1997; Zbl 0909.47026)
Li, Song Approximation theorems for a class of modified Szász-Kantorovich operators and Baskakov-Kantorovich operators. (Chinese) Zbl 0899.41015 Acta Math. Sci. (Chin. Ed.) 16, No. 3, 344-352 (1996). Reviewer: Shi Ying-Guang (Beijing) MSC: 41A35 41A36 PDFBibTeX XMLCite \textit{S. Li}, Acta Math. Sci. (Chin. Ed.) 16, No. 3, 344--352 (1996; Zbl 0899.41015)
Li, Song Approximation properties of bivariate Bernstein-Kantorovich operators. (Chinese) Zbl 0900.41016 Acta Math. Sci. (Chin. Ed.) 15, No. 3, 352-360 (1995). MSC: 41A36 41A25 41A63 PDFBibTeX XMLCite \textit{S. Li}, Acta Math. Sci. (Chin. Ed.) 15, No. 3, 352--360 (1995; Zbl 0900.41016)