CÎRULIS, T.; LIETUVIETIS, O. Degenerate matrix method for solving nonlinear systems of differential equations. Mathematical Modelling and Analysis, [S. l.], v. 3, n. 1, p. 45–56, 1998. DOI: 10.3846/13926292.1998.9637085. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/9986. Acesso em: 2 jun. 2025.