0003-2573 0003-2573 S0003-25732021000400824 10.31447/as00032573.2021241.11 Portugal 30 12 2021 30 12 2021 241 824 827 1977 2004 4 415-43 2003 2018 42 1 1 106-14 1964 2008 2004 4 487-509 2007 24 69-95