1659-4266
1659-4266
S1659-42662016000200189
10.22458/urj.v8i2.1560
Costa Rica
00
12
2016
00
12
2016
8
2
189
194
[
2009
]
[
2015
34
13-25.
]
[
2015
40
1
1
151-64
]
[
1996
119
2
2
254
]
[
2013
72
2
2
79
]
[
2015
5
4
4
73-80
]
[
2015
36
1
1
129-47
]
[
1989
18
119-44
]
[
2015
87
1-9
]
[
2014
5
2
2
20-4
]
[
2015
1-14
]