Draganov, Borislav. 2018. “Strong Converse Inequalities for the Weighted Multivariate Bernstein-Durrmeyer Operator on the Simplex via Multipliers”. Ann. Sofia Univ. Fac. Math. And Inf. 105 (December):55-73. https://doi.org/10.60063/gsu.fmi.105.55-73.