1409-4703
1409-4703
S1409-47032018000200559
10.15517/aie.v18i2.33164
Venezuela
Venezuela
00
08
2018
00
08
2018
18
2
559
579
[
2003
271-300
]
[
2010
6
1
1
37-42
]
[
2011
37
1
1
293-302
]
[
2010
14
9-33
]
[
2006
23
2
2
157-81
]
[
2001
12
4
4
194-8
]
[
1996
14
3
3
279-88
]
[
2004
100
1
1
25-33
]
[
1988
6
2
2
109-20
]
[
2001
31
2
2
157-69
]
[
2016
38
3-4
3-4
16-9
]
[
2007
10
1
1
83-94
]
[
1995
13
89-102
]
[
2005
2da
]
[
1989
7
3
3
257-65
]
[
2005
4
1
1
8-22
]
[
2010
28
3
3
315-26
]
[
2011
22
1
1
2-7
]
[
2005
19
1
1
91-102
]
[
2001
31
2
2
171-84
]
[
1998
]
[
1985
12
1
1
25-57
]
[
2004
92
4
4
115136
]
[
1991
7
2
2
75-83
]
[
2006
7
2
2
49-63
]
[
2008
18
1
1
53-71
]
[
2012
16
2
2
343-60
]
[
2004
5
3
3
229-45
]
[
2001
97
2
2
48-52
]
[
2016
8
5
5
393-8
]
[
2006
3
3
50-63
]
[
2010
27
1
1
67-93
]
[
2012
3
2
2
38-46
]
[
2014
25
1
1
46-55
]
[
2002
311
66-70
]
[
2017
8
12
12
36-44
]
[
2011
13
1
1
]
[
2004
15
1
1
52-8
]
[
2009
20
220-6
]
[
2012
108
1
1
44-8
]
[
2011
22
2
2
103-16
]
[
2009
33
126
126
125-8
]
[
2001
31
2
2
197-208
]