Milovanović, Gradimir V., Abdullah Mir, and Adil Hussain. “Estimates for the Polar Derivative of a Constrained Polynomial on a Disk”. CUBO, A Mathematical Journal 24, no. 3 (December 21, 2022): 541–554. Accessed October 12, 2025. https://cubo.ufro.cl/index.php/cubo/article/view/3214.