Baddour, Hassan, Mohammad Ali, and Majd Ayash. “Estimates of Initial Coefficients in Some Subclasses of Bi-Univalent Functions”. Tishreen University Journal -Basic Sciences Series 40, no. 3 (November 18, 2018). Accessed May 17, 2024. https://journal.tishreen.edu.sy/index.php/bassnc/article/view/4704.