PFLUGER, A. Some coefficient problems for starlike functions. Annales Fennici Mathematici, [S. l.], v. 2, n. 1, p. 383–396, 1976. DOI: 10.5186/aasfm.1976.0226. Disponível em: https://afm.journal.fi/article/view/134305. Acesso em: 14 apr. 2025.