Hu, Zhenyong, SrivastavaH. M., and Ying Zhang. “Sharp Starlike and Convex Radius for the Differential Operator of Analytic Functions”. Ukrains’kyi Matematychnyi Zhurnal 76, no. 10 (October 31, 2024): 1455 - 1462. Accessed December 12, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7788.