Stepanec A, Romanyuk V. Classes of $(\psi, \beta)$-differential functions of complex variable and approximation by linear averages of their Faber series . Ukr. Mat. Zhurn. [Internet]. 1992Nov.6 [cited 2024Jul.27];44(11):1556-70. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8259