STEPANEC, A.I.; ROMANYUK, V.S. Classes of $(\psi, \beta)$-differential functions of complex variable and approximation by linear averages of their Faber series . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 11, p. 1556–1570, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8259. Acesso em: 5 dec. 2025.