SIDOROV, M.V. Green-Rvachev’s quasi-function method for constructing two-sided approximations to positive solution of nonlinear boundary value problems. Carpathian Mathematical Publications, [S. l.], v. 10, n. 2, p. 360–375, 2018. DOI: 10.15330/cmp.10.2.360-375. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/1496. Acesso em: 22 jul. 2024.