Orhan H. Coefficient estimates in new subclasses of analytic and bi-univalent functions defined by the combinations of the $q$-derivative and the Sǎlǎgean derivative operator. Ukr. Mat. Zhurn. [Internet]. 2026 Jan. 26 [cited 2026 Jan. 27];78(1-2):88. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/9261