The Approximate Numerical Solutions to First Order Non-Linear Differential Equations and Their Connections to the Orthogonal Double Cover in Graph Theory. Contemporary Mathematics , [S. l.], v. 6, n. 4, p. 3873–3889, 2025. DOI: 10.37256/cm.6420253740. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/3740. Acesso em: 24 dec. 2025.