1727-8120
1727-8120
S1727-81202018000300697
Ecuador
00
12
2018
00
12
2018
18
3
697
717
[
2018
]
[
1986
12
1
1
50-66
]
[
2005
]
[
2008
2
]
[
2000
]
[
2014
2
1
1
115-24
]
[
2015
7
2
2
163-78
]
[
2009
33
2
2
171-90
]
[
2017
]
[
2013
21
2
2
363-92
]
[
2011
27
4
4
309-18
]
[
2002
40
^s2
^s2
2
8-19
]
[
2011
14
2
2
1-14
]
[
2011
3
2
2
55-82
]
[
2016
]
[
2012
38
4
4
325-35
]
[
2015
]
[
2011
]
[
2015
71
7
7
32-3
]
[
1999
]
[
2010
10
1
1
]
[
2014
]
[
2017
]
[
2016
44
1
1
50-78
]
[
2008
]
[
2018
3
]
[
2016
]
[
Fundación Universia
2018
]
[
2009
15
2
2
143-52
]
[
2016
2
1
1
215-20
]
[
2003
21
2
2
363-92
]
[
2008
23
1
1
7-18
]
[
2007
]
[
2003
]
[
2003
]
[
2013
]
[
2015
28
3
3
167-73
]
[
2012
]
[
1991
]
[
2014
62
3
3
407-13
]
[
2004
]