HEIDARI TAVANI, M. R. Existence Results for A Perturbed Fourth-Order Equation. Journal of the Indonesian Mathematical Society, [S. l.], v. 23, n. 2, p. 55–65, 2017. DOI: 10.22342/jims.23.2.498.55-65. Disponível em: http://jims-a.org/index.php/jimsa/article/view/498. Acesso em: 6 may. 2024.