MUKHIGULASHVILI, Sulkhan. The Dirichlet BVP for the second order nonlinear ordinary differential equation at resonance. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 28, p. 177–204, 2011. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/5996. Acesso em: 18 jul. 2026.