ALTINKAYA, S.; KANAS, S.; YAL¸CIN, S. Subclass of $k$-uniformly starlike functions defined by symmetric $q$-derivative operator. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 11, p. 1499–1510, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1653. Acesso em: 5 dec. 2025.