1809-3876 1809-3876 S1809-38762019000100001 10.23925/10.23925/1809-3876.2019v17i1p1-9 Brazil Brazil 00 01 2019 00 01 2019 17 1 1 9 2017 15 4 4 894-926 CED/PUC-SP 2007 2005 2018 2016 14 02 02 625-52