HuZ., SrivastavaH. M., and ZhangY. “Sharp Starlike and Convex Radius for the Differential Operator of Analytic Functions”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 76, no. 10, Oct. 2024, pp. 1455 -62, doi:10.3842/umzh.v76i10.7788.