1646-933x 1646-933x S1646-933x2016000200021 10.1549/1646933Xv9n22016010600021 Brazil Portugal 00 12 2016 00 12 2016 9 2 21 36

12 783-809 6 12 12 1-9 46 1 1 93-111 7 1 1 101-19 26 5 5 305-16 29 3 3 17-40