CAVALCANTE, Thiago R. and SILVA, Edcarlos D. Fourth-order elliptic problems involving concave-superlinear nonlinearities. Topological Methods in Nonlinear Analysis. Online. 11 December 2022. Vol. 60, no. 2, pp. 581 - 600. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2022.011.