0034-7744
0034-7744
S0034-77442019000400861
10.15517/rbt.v67i4.35190
Ecuador
Ecuador
Colombia
00
09
2019
00
09
2019
67
4
861
878
[
2013
34
115-27
]
[
1997
37
149-61
]
[
2009
1
11-16.
]
[
2013
84
1
1
381-3
]
[
2003
13
1473-90
]
[
2006
66
2B
2B
611-22
]
[
2007
24
283-93
]
[
2003
158
317-42
]
[
2004
132
3
3
509-21
]
[
2018
42
157
157
17-26
]
[
2004
104
185-228
]
[
2010
177
267-82
]
[
2003
33
1
1
29-43
]
[
2016
57
27-59
]
[
2010
55
1447-64
]
[
2009
]
[
2015
33
47-54
]
[
2017
609
724-34
]
[
2007
80
2
2
225-42
]
[
1994
31
131-42
]
[
1999
]
[
1982
]
[
2017
20
2
2
413-24
]
[
2018
66
4
4
]
[
2006
2
17-32
]
[
2014
62
Suppl. 2
Suppl. 2
203-19
]
[
2016
5
2
2
1-11
]
[
2015
]
[
2001
]
[
2015
27
4
4
394-410
]
[
1982
]
[
2014
9
]
[
2016
6
4849-65
]
[
2018
52
1
1
77-92
]
[
2016
87
436-42
]
[
1998
142
1
1
53-70
]
[
2008
255
3
3
753-64
]
[
2016
8
1
1
69-75
]
[
2015
39
150
150
42-9
]
[
2009
19
2
2
468-79
]
[
2012
34
2
2
443-56
]
[
R Core Team.
2012
]
[
2006
25
1
1
108-25
]
[
2016
a
75
1
1
107-20
]
[
2016
b
89
1
1
102-30
]
[
2009
94
4
4
357-71
]
[
2011
96
6
6
667-85
]
[
2003
]
[
1993
]
[
1993
29
395-410
]
[
2016
4
19
19
1-12
]
[
2012
16
31-45
]
[
1997
37
367-87
]
[
2009
257
2
2
385-9
]
[
2016
]
[
2013
29
79-92
]
[
1999
]