Patil, Amol, and Uday Naik. “Estimates on Initial Coefficients of Certain Subclasses of Bi-Univalent Functions Associated With Quasi-Subordination”. Global Journal of Mathematical Analysis 5, no. 1 (December 24, 2016): 6–10. Accessed April 29, 2024. https://www.sciencepubco.com/index.php/GJMA/article/view/6959.