CĂTINAȘ, Teodora, and Andra MALINA. “The Combined Shepard Operator of Inverse Quadratic and Inverse Multiquadric Type”. Studia Universitatis Babeș-Bolyai Mathematica, vol. 67, no. 3, Sept. 2022, pp. 579–589, doi:10.24193/subbmath.2022.3.09.