MOSADEGH, N.; ABEDI, E.; ILMAKCHI, M. Ricci soliton biharmonic hypersurfaces in the Euclidean space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 7, p. 931–937, 2021. DOI: 10.37863/umzh.v73i7.495. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/495. Acesso em: 14 apr. 2025.