1646-933x 1646-933x S1646-933x2017000100020 10.1549/1646933Xv10n120172035 Portugal Portugal 00 06 2017 00 06 2017 10 1 20 35

31 2 2 135-39 15 3 3 42 1 1 85-90 75 2 2 60-4 17 9 9 43 2 2 259-64 24 49 49 61-9