0034-7744
0034-7744
S0034-77442021000200557
10.15517/rbt.v69i2.45046
Ecuador
Ecuador
00
06
2021
00
06
2021
69
2
557
572
[
2006
8
162-87
]
[
2015
124
9
9
1109-20
]
[
2008
72
10
10
1973-6
]
[
2008
72
904-13
]
[
2015
18
]
[
1995
]
[
2006
]
[
2020
30
4
4
]
[
2005
58
85-8
]
[
2011
37
6
6
542-53
]
[
2009
41
2
2
142-53
]
[
2006
7
360-9
]
[
2020
10
1-13
]
[
2019
10
31
31
1-22
]
[
2019
7
265
]
[
2014
345
6195
6195
401-6
]
[
2017
3
1
1
107-16
]
[
2018
52
11-9
]
[
2012
21
1-2
1-2
167-79
]
[
2013
24
6
6
1098-107
]
[
2008
45
371-80
]
[
2013
163
1-6
]
[
1993
30
1
1
63-74
]
[
2019
10
1
1
1-7
]
[
2008
3
3
3
]
[
2011
28
536-46
]
[
2012
22
12
12
4-10
]
[
1982
215
19-27
]
[
2018
50
1
1
169-77
]
[
2019
24
4
4
1-23
]
[
2000
125-66
]
[
2003
56
255-9
]
[
2010
13
163-72
]
[
2014
29
2
2
107-16
]
[
2015
57
61-82
]
[
2018
67
1
1
120-5
]
[
2000
53
3
3
322-8
]
[
2015
24
3
3
22-7
]
[
2005
15
1
1
21-8
]
[
2008
1
161-75
]
[
2008
165-91
]
[
2006
33
3
3
491-505
]
[
1995
33
194-210
]
[
1993
66
2
2
364-8
]
[
2004
]
[
2013
8
1
1
4-17
]
[
2019
]
[
2016
25
2
2
13-23
]
[
2005
]
[
2016
113
4
4
892-7
]
[
2015
5
13
13
2621-32
]
[
2017
249
137-43
]
[
2018
41
1
1
153-63
]
[
2020
52
457-69
]
[
R Core Team
2019
]
[
2015
52
3
3
611-20
]
[
2006
]
[
1999
13
5
5
1162-71
]
[
2010
188
2
2
333-53
]
[
2020
]
[
2017
]
[
2015
10
2
2
]
[
1997
277
494-9
]