Fair Certified Email Protocol. INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY, [S. l.], v. 10, n. 1, p. 1255–1260, 2013. DOI: 10.24297/ijct.v10i1.3328. Disponível em: https://rajpub.com/index.php/ijct/article/view/3328. Acesso em: 17 apr. 2025.