ENNOLA, V.; SMYTH, C. Conjugate algebraic numbers on a circle. Annales Fennici Mathematici, [S. l.], n. 582, 1975. DOI: 10.5186/aasfm.1975.582. Disponível em: https://afm.journal.fi/article/view/134218. Acesso em: 25 nov. 2024.