0034-7744
0034-7744
S0034-77442021000100113
10.15517/rbt.v69i1.40964
Ecuador
USA
Ecuador
00
03
2021
00
03
2021
69
1
113
126
[
2010
177
1
1
57-79
]
[
1995
]
[
1987
23
1
1
27-60
]
[
2007
41
48-65
]
[
2011
]
[
1998
]
[
2016
25
2
2
46-58
]
[
2018
66
1
1
136-48
]
[
2014
84
1
1
45-67
]
[
2015
873-82
]
[
2006
]
[
1994
]
[
2016
41
1
1
73-92
]
[
2018
45
7
7
1571-81
]
[
2019
365
1124-9
]
[
2001
]
[
2016
25
2
2
1-4
]
[
2019
101
4
4
663-75
]
[
2010
58
4
4
3-37
]
[
1992
]
[
2016
]
[
2003
158
2
2
145-67
]
[
2016
374
2065
2065
1-16
]
[
2018
77
1
1
1-6
]
[
2015
11
1
1
48-67
]
[
2001
37
12
12
3321-9
]
[
2015
12
8
8
2549-63
]
[
1998
12
3
3
516-20
]
[
2018
4
3
3
1-10
]
[
2018
44
1
1
101-9
]
[
2003
21
50-7
]
[
2018
]
[
2018
77
^s1
^s1
1
65-80
]
[
2018
47
2
2
256-70
]
[
2011
]
[
2009
1
631-54
]
[
2014
62
249-73
]
[
2019
205-20
]
[
1983
135
9-79
]
[
2000
22
1
1
34-60
]
[
2000
22
1
1
15-33
]
[
2008
67
3-4
3-4
45-58
]
[
2019
11
2
2
92-105
]
[
1999
]
[
2011
98
8
8
1565-72
]
[
2014
42
5
5
1072-86
]
[
2020
39
2
2
677-91
]
[
2018
215-49
]