TOYOU, L. R.; DOUMATE, J.; LEADI, L. Existence of principal eigensurfaces for cooperative \((p_1, . . . , p_n)\)-biharmonic systems. Malaya Journal of Matematik, India, v. 13, n. 01, p. 26–36, 2025. DOI: 10.26637/mjm1301/004. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/2034. Acesso em: 22 feb. 2025.