ASSIRI, E. Q.; MOGRA, M. L. A unified approach for univalent functions with negative coefficients using the Hadamard product. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 9, p. 1162–1170, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5113. Acesso em: 6 dec. 2025.