1809-3876 1809-3876 S1809-38762017000300787 10.23925/1809-3876.2017v15i3p787-820 Brazil Brazil Brazil 00 07 2017 00 07 2017 15 3 787 820

3 3 3 89-106 3 4 4 171-1225 2 17 17 99-104