1390-6542
1390-6542
S1390-65422014000300025
10.29019/enfoqueute.v5n3.42
Ecuador
00
09
2014
00
09
2014
5
3
25
44
[
2012
36
1
1
60-7
]
[
1992
]
[
2012
1-26
]
[
2014
106
86-94
]
[
2013
53
923-36
]
[
2001
22-6
]
[
2007
]
[
2013
50
378-86
]
[
2011
99
5
5
624-37
]
[
2013
203-8
]
[
2001
89
3-4
3-4
309-24
]
[
2010
1-14
]
[
2012
1061-6
]
[
2000
]
[
2012
39
1
1
40-7
]
[
2014
29
828-34
]
[
1989
]
[
2011
169
95-104
]
[
2014
55
285-96
]
[
2014
54
664-71
]
[
2011
444 - 448
]
[
2010
]
[
2009
1-34
]
[
2013
57
27-34
]
[
2012
24
63-9
]
[
2014
78
968-75
]
[
2014
5
1
1
237-45
]
[
2012
104-15
]
[
2012
1-4
]
[
2010
52
81
81
1-9
]
[
2014
61
69-73
]
[
2004
29
3
3
421-31
]
[
1995
31
6
6
1363-70
]
[
2011
81
5
5
1117-23
]
[
2009
34
5
5
1312-8
]
[
2013
5
1
1
137-48
]
[
2012
14
298-303
]
[
2013
95
192-9
]
[
2014
63
172-80
]
[
2014
126
1-10
]
[
2006
]
[
2011
36
1
1
132-41
]
[
2012
43
1
1
11-9
]
[
2011
88
5
5
1864-72
]
[
2011
1072-5
]
[
2014
108
304-14
]
[
2014
66
159-69
]
[
2012
14
1362-7
]
[
2010
80
6
6
698-706
]