KIM, Taekyun; KIM, Dae San. Some identities on degenerate trigonometric functions. Carpathian Mathematical Publications, [S. l.], v. 17, n. 2, p. 369–375, 2025. DOI: 10.15330/cmp.17.2.369-375. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/8457. Acesso em: 5 dec. 2025.