An Asymptotic Method with Applications to Nonlinear Coupled Partial Differential Equations. Punjab University Journal of Mathematics, [S. l.], v. 50, n. 1, p. 134–146, 2018. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/124. Acesso em: 29 jun. 2025.