Restoration From The External Curvature Of A Surface With A Sin. Uzbekistan Journal of Mathematics and Computer Science , [S. l.], v. 1, n. 1, p. 50–56, 2025. DOI: 10.56143/ujmcs.v1i1.5. Disponível em: https://ujmcs.tstu.uz/index.php/ujmcs/article/view/5. Acesso em: 6 dec. 2025.