BEN YAHIA, Z.; ZINE EL ABIDINE, Z. . An Existence Result for a Class of Coupled Polyharmonic Systems. Contemporary Mathematics, [S. l.], v. 2, n. 4, p. 304–318, 2021. DOI: 10.37256/cm.2420211031. Disponível em: https://ojs.wiserpub.com/index.php/CM/article/view/1031. Acesso em: 22 dec. 2024.