BÉNYI, Beáta. Trigonometric identities via combinatorics. Teaching Mathematics and Computer Science, [S. l.], v. 17, n. 1, p. 73–91, 2019. DOI: 10.5485/TMCS.2019.0461. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/10950. Acesso em: 25 nov. 2024.