SOUSA, Jose Luiz Antunes de Oliveira e. Cover Pages - v12n6 December 2019. RIEM - IBRACON Structures and Materials Journal, [S.l.], v. 12, n. 6, nov. 2019. ISSN 1983-4195. Available at: <http://revistas.ibracon.org.br/index.php/riem/article/view/1981>. Date accessed: 21 nov. 2019.