0870-8231
0870-8231
S0870-82312021000200299
10.14417/ap.1688
Portugal
USA
31
12
2021
31
12
2021
39
2
299
311
[
2001
42
437-44
]
[
2009
16
3
3
397-438
]
[
1967
75
43-88
]
[
1971
4
1
1
1-103
]
[
1989
349-78
]
[
1991
11
1
1
56-95
]
[
1965
]
[
1980
]
[
2012
41
2
2
138-49
]
[
2018
30
2
2
339-416
]
[
1980
2
389-444
]
[
2007
14
464-504
]
[
2013
60
4
4
43-52
]
[
2008
12
4
4
176-80
]
[
1993
113
3
3
487-96
]
[
1991
3
2
2
182-7
]
[
1999
6
1-55
]
[
2011
3rd
]
[
2009
40
2
2
197-212
]
[
1983
4th
1-101
]
[
1991
62
1
1
190-8
]
[
2011
]
[
2016
23
1
1
116-39
]
[
2014
43
1361-73
]
[
2012
7th
]
[
2013
26
3
3
617-25
]
[
1992
18
2
2
19-36
]
[
2017
53
5
5
873-932
]
[
2012
47
667-96
]
[
2011
71
684-711
]
[
1982
38
1
1
129-34
]
[
2003
6
1
1
73-80
]
[
1984
55
2
2
586-97
]
[
2016
42
1-7
]
[
2006
]
[
2006
32
2
2
177-84
]