Draganov, Borislav. “Strong Converse Inequalities for the Weighted Multivariate Bernstein-Durrmeyer Operator on the Simplex via Multipliers”. Ann. Sofia Univ. Fac. Math. and Inf. 105 (December 12, 2018): 55–73. Accessed November 24, 2024. https://stipendii.uni-sofia.bg/index.php/fmi/article/view/12.