0120-6346
0120-6346
S0120-63462018000400171
10.22395/seec.v21n49a7
Colombia
Colombia
Colombia
00
12
2018
00
12
2018
21
49
171
197
[
2012
45
45
]
[
2014
36
3
3
467-90
]
[
2007
31
1
1
101-22
]
[
2011
32
]
[
2015
850
850
24
]
[
2014
853
853
32
]
[
2012
31
3
3
493-502
]
[
2014
46
2
2
291-302
]
[
2005
55
55
101-65
]
[
2012
359
]
[
1933
337-57
]
[
2009
16
]
[
2010
122
122
66-87
]
[
2016
16-09
16-09
]
[
2013
13-28
]
[
2003
1026
]
[
2014
43
]
[
2014
776
]
[
2004
32
32
34
]
[
2004
25
5
5
639-49
]
[
2005
142
]
[
2014
660
]
[
1986
385
]
[
1992
74
74
10
]
[
2015
167-89
]
[
2013
31
70
70
17-66
]
[
2009
278
]
[
2009
II
]
[
2015
535
]
[
2013
13
1
1
76-94
]