Ali, Rosihan M.Ravichandran, VaithiyanathanSharma, Kanika2026-09-302026-09-302021-10-2923144629https://doi.org/10.1155/2021/8373209http://nitt.ndl.gov.in/handle/123456789/296Let h be a nonvanishing analytic function in the open unit disc with h0=1. Consider the class consisting of normalized analytic functions f whose ratios fz/gz, gz/zpz, and pz are each subordinate to h for some analytic functions g and p. The radius of starlikeness of order α is obtained for this class when h is chosen to be either hz=1+z or hz=ez. Further, starlikeness radii are also obtained for each of these two classes, which include the radius of Janowski starlikeness, and the radius of parabolic starlikeness. © 2021 Rosihan M. Ali et al.enArticle