1390-6542
1390-6542
S1390-65422020000100056
10.29019/enfoque.v11n1.584
Ecuador
Ecuador
00
03
2020
00
03
2020
11
1
56
67
[
2013
5
41-51
]
[
2012
1-12
]
[
2018
9
168-79
]
[
1981
37
860-1
]
[
2016
]
[
2011
50
602-13
]
[
2015
]
[
2012
4
1035-9
]
[
2015
1-5
]
[
2017
]
[
2014
12
]
[
2015
3
]
[
2017
]
[
2012
]
[
2013
1
102-6
]
[
2017
]
[
2017
]
[
2017
]
[
2017
]
[
2014
23
431-50
]
[
2018
]
[
2015
]
[
2017
29
462-72
]
[
2016
]
[
2018
]