1794-1237
1794-1237
S1794-12372018000200013
10.24050/reia.v15i30.903
Colombia
Colombia
00
12
2018
00
12
2018
15
30
13
24
[
2007
119-328
]
[
1988
33-269
]
[
1994
27
6
6
51-8
]
[
1980
12
214-9
]
[
1998
289
]
[
1965
21
10
10
494-8
]
[
1965
7
4
4
308-13
]
[
2005
]
[
2008
13
3
3
334-54
]
[
R Core Team
2014
]