1390-6542
1390-6542
S1390-65422018000400145
10.29019/enfoqueute.v9n4.348
Ecuador
Ecuador
Ecuador
Nueva Zelanda
00
12
2018
00
12
2018
9
4
145
153
[
2010
18
1
1
97-116
]
[
2018
6
1
1
78-84
]
[
2014
31
1
1
204-9
]
[
2014
9
8
8
e103891
]
[
2005
]
[
2002
20
8
8
338-43
]
[
1989
96
337-45
]
[
2005
96
2
2
190-4
]
[
2006
39
1
1
1-8
]
[
2003
]
[
1998
]
[
2014
9
53
53
3838-52
]
[
2015
35
3
3
334-41
]
[
2002
]
[
2011
26
2
2
128-34
]
[
2012
15
2
2
126-34
]
[
2015
17
2
2
95-102
]
[
2012
29
3
3
150-6
]
[
2005
272
2
2
493-9
]