1659-4266
1659-4266
S1659-42662018000200404
10.22458/urj.v10i2.2169
El Salvador
Costa Rica
Costa Rica
00
12
2018
00
12
2018
10
2
404
408
[
2017
15
3
3
]
[
2013
9
5
5
987-1019
]
[
2018
1-9
]
[
2002
]
[
2008
12
4
4
5
]
[
2017
45
5
5
879-90
]
[
2018
66
1
1
246-65
]
[
2017
]
[
2014
84
4
4
996-1013.
]
[
1997
]
[
1970
]
[
2011
]
[
2009
2307
1-38.
]
[
2013
3608
6
6
440-56
]
[
2009
]
[
2016
).
]
[
2011
]
[
2004
2004
2
2
281-97
]
[
2015
]
[
2000
67
2
2
709-28
]