1646-5954
1646-5954
S1646-59542020000400158
10.15847/obsobs14420201720
Portugal
30
12
2020
30
12
2020
14
4
158
172
[
2007
]
[
2013
10
177-88
]
[
1997
23
2/3
2/3
119-38
]
[
2000
]
[
2003
]
[
2008
16
31
31
153-8
]
[
2009
]
[
1997
1-33
]
[
1996
]
[
1993
]
[
1989
]
[
1997
258-84
]
[
1997
]
[
2002
]
[
2007
]
[
1995
]
[
1998
]
[
1999
]
[
2009
]
[
2017
]
[
2008
2
2
2
264-79
]
[
2009
10
6
6
546-63
]
[
1999
]
[
1999
]
[
2007
]
[
1992
]
[
2013
29
171-98
]
[
2015
365-94
]
[
2009
]
[
1999
]
[
1998
]
[
2019
13
2
2
48-67
]