Helicalaone, two, threearevolutional Cyclical Surfaces. Global Journal of Science Frontier Research, [S. l.], v. 13, n. F4, p. 47–56, 2013. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/100477. Acesso em: 14 aug. 2026.