1646-706X 1646-706X S1646-706X2020000400197 Portugal Portugal Portugal 00 12 2020 00 12 2020 16 4 197 199 1 2019 7 8 8 E1020-30 2 2020 107 1 1 20-32 3 2018 39 763-816 5 2018 391 219-29 2020 382 21 21 1994-2004 6 2020 75 5 5 498-508