0034-7744
0034-7744
S0034-77442021000100045
10.15517/rbt.v69i1.41814
Ecuador
Spain
USA
00
03
2021
00
03
2021
69
1
45
59
[
2012
105
817-31
]
[
2018
]
[
2009
98
139-51
]
[
2016
104
554-69
]
[
2019
126
706-20
]
[
2006
273
431-7
]
[
2012
30
83-119
]
[
1994
19
43-154
]
[
1982
36
189-99
]
[
2014
32
998-1008
]
[
2003
57
717-45
]
[
2009
63
2004-16
]
[
2008
22
561-74
]
[
2016
64
157-76
]
[
1978
4
1-628
]
[
1991
78
273-95
]
[
1921
51
503-23
]
[
1977
]
[
2007
7
22
]
[
2019
833
217-29
]
[
2019
73
1873-84
]
[
2020
27
4075-88
]
[
1977
]
[
1999
53
1637-53
]
[
2002
56
1199-216
]
[
1932
]
[
2010
76
2401-17
]
[
2015
]
[
2020
68
122-38
]
[
2011
11
353-7
]
[
2016
226
113-37
]
[
2015
]
[
2010
200-48
]
[
2015
103
651-63
]
[
2017
12
6
6
]
[
1994
9
373-5
]
[
2000
403
853-8
]
[
2016
]
[
2017
4272
221-35
]
[
2019
14
7
7
]
[
1993
8
129-32
]
[
2018
]
[
2018
]
[
2013
36
123-39
]
[
2006
53
24-33
]
[
1957
38
913-20
]
[
2017
105
3
3
514-22
]
[
2012
3243
52-8
]
[
1917
]
[
2010
28
977-90
]
[
2018
]
[
1980
37
30-137
]
[
1984
24
107-20
]
[
2003
]
[
2003
]
[
2008
107-46
]
[
2012
]