PAKAPONGPUN, A.; CHAILANGKA, N. Jacobsthal Trigonometric Functions. Journal of the Indonesian Mathematical Society, [S. l.], v. 31, n. 4, p. 1808, 2025. DOI: 10.22342/jims.v31i4.1808. Disponível em: http://jims-a.org/index.php/jimsa/article/view/1808. Acesso em: 13 nov. 2025.