TAVANI , M. R. H. Existence of three weak solutions for fourth-order elastic beam equations on the whole space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 12, p. 1697–1707, 2020. DOI: 10.37863/umzh.v72i12.881. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/881. Acesso em: 7 apr. 2025.