DJAA, N. E. H.; ZAGANE, A. Harmonicity of deformed gradient metric. International Journal of Maps in Mathematics, [S. l.], v. 5, n. 1, p. 61–77, 2022. Disponível em: http://journalmim.com/index.php/journalMIM/article/view/103. Acesso em: 28 apr. 2024.