1409-4258
1409-4258
S1409-42582018000300068
10.15359/ree.22-3.4
Colombia
Colombia
Colombia
Colombia
00
12
2018
00
12
2018
22
3
68
84
[
2012
46
3
3
423-8
]
[
2002
295
5564
5564
2367
]
[
1981
15
3
3
213-8
]
[
1998
32
2
2
112-8
]
[
2012
24
6
6
4-9
]
[
1997
87-96
]
[
2005
19
4
4
1030-6
]
[
2008
105
^s1
^s1
1
11579-86
]
[
2003
30
02
02
139-46
]
[
1984
177-213
]
[
1993
41-72
]
[
2006
28
8
8
895-918
]
[
1995
29
1
1
3-4
]
[
2009
23
4
4
1041-6
]
[
2005
20
8
8
430-4
]
[
2012
78
78
9-18
]
[
1998
29
3
3
55-60
]
[
2000
32
5
5
711-23
]
[
2010
47
6
6
417-25
]
[
2009
68
5
5
1535-48
]
[
1993
2
3
3
258-82
]
[
2008
3
7
7
]
[
2001
3
2
2
169-83
]
[
2006
21
3
3
249-65
]
[
2011
175-94
]
[
2014
7
12
12
21-32
]
[
2013
]
[
1988
7
7
547-71
]
[
2004
2
2
2
159-74
]