0124-5376
0124-5376
S0124-53762019000200128
10.21068/c2019.v20n02a10
Ecuador
00
12
2019
00
12
2019
20
2
128
133
[
2013
73
1
1
85-194
]
[
2010
5
]
[
2000
133
2
2
167-70
]
[
2016
7
6
6
483-9
]
[
1999
7
1
1
195-7
]
[
2015
7
2
2
75-90
]
[
2014
74
3
3
366-9
]
[
2005
55
2
2
125-36
]
[
2016
]
[
2007
55
1-2
1-2
73-6
]
[
2004
]
[
2017
7
2
2
114-8
]
[
2013
22
2
2
84-96
]
[
2018
13
]
[
2017
8
1
1
45-52
]
[
2006
12
1
1
250-4
]
[
2010
26
5
5
231-9
]
[
2012
]
[
2016
17
1
1
131-5
]
[
2018
2
19
19
133-9
]
[
2001
55
10
10
2097-104
]
[
2008
62
7
7
1555-70
]
[
2016
87
2
2
531-4
]
[
1992
134
1
1
22-6
]
[
2015
2
733-62
]
[
1995
76
4
4
1013-9
]
[
1995
361
1-5
]
[
2008
24
425-46
]
[
1999
16
4
4
1229-32
]
[
1991
53
167-73
]
[
2011
2
]
[
2017
2
]
[
1994
11
2
2
341-3
]
[
2010
64
7
7
2153-8
]
[
2009
22
4
4
243-6
]
[
2001
8
1
1
59-66
]