CODINA, Lluí­s. Some questions about the old and the new SEO. Anuario ThinkEPI, [S. l.], v. 9, p. 264–266, 2015. DOI: 10.3145/thinkepi.2015.62. Disponível em: https://thinkepi.scimagoepi.com/index.php/ThinkEPI/article/view/thinkepi.2015.62. Acesso em: 7 may. 2026.