FERREIRO, J. Introduction. Economics and Business Letters, [S. l.], v. 2, n. 3, p. 84–85, 2013. DOI: 10.17811/ebl.2.3.2013.84-85. Disponível em: https://reunido.uniovi.es/index.php/EBL/article/view/10091. Acesso em: 3 may. 2024.