Geometric series of positive linear operators and the inverse Voronovskaya theorem on a compact interval. - Ulrich Abel; Mircea Ivan; Radu Paltanea (J. Approx. Theory, 2014)

The Durrmeyer variant of an operator defined by D.D. Stancu. - Ulrich Abel; Mircea Ivan; Radu Paltanea (Appl. Math. Comput., 2015)

A Definition of Two-Dimensional Schoenberg Type Operators. - Camelia Liliana Moldovan; Radu Paltanea (Symmetry, 2020)

Preserving the Shape of Functions by Applying Multidimensional Schoenberg-Type Operators. - Camelia Liliana Moldovan; Radu Paltanea (Symmetry, 2021)

On approximation of unbounded functions by certain modified Bernstein operators. - Radu Paltanea (Math. Found. Comput., 2023)