1390-8618
1390-8618
S1390-86182017000100231
10.17163/ret.n13.2017.08
Ecuador
Ecuador
Ecuador
00
09
2017
00
09
2017
7
13
231
250
[
2012
32
32
142-64
]
[
2015
13
1
1
99-105
]
[
2011
171
171
]
[
2013
]
[
2003
]
[
2015
6
1
1
64-73
]
[
2012
11
1
1
55-78
]
[
2014
]
[
2009
]
[
2013
14
4
4
537-51
]
[
2008
43
43
134-49
]
[
2010
]
[
2013
13
13
217-32
]
[
2011
8
4
4
115-36
]
[
2011
]
[
2012
]
[
2013
2
6
6
4-10
]
[
2014
19
2
2
9-41
]
[
2012
34
2
2
227-236.
]
[
2014
19
3
3
251-60
]
[
2012
]
[
2011
41
41
41-46.
]
[
2011
]
[
2011
16
49
49
85-91
]
[
2011
6
1
1
10-19.
]
[
2011
]