1561-3194
1561-3194
S1561-31942019000200302
Ecuador
00
04
2019
00
04
2019
23
2
302
309
[
2015
53
3
3
]
[
2016
24
45
45
]
[
2015
4
43
43
]
[
2017
55
1
1
]
[
2018
22
]
[
2016
5
20
20
]
[
2018
12
2
2
]
[
2015
7
2
2
]
[
2016
5
17
17
]
[
2017
21
4
4
]
[
2016
7
2
2
]
[
2017
10
2
2
]
[
2016
21
2
2
]
[
2015
18
2
2
]