1659-4266
1659-4266
S1659-42662018000100214
10.22458/urj.v10i1.2029
Costa Rica
Costa Rica
Costa Rica
00
06
2018
00
06
2018
10
1
214
220
[
2011
]
[
2005
55
12
12
1041-51
]
[
2004
30
59-72
]
[
2013
9
5
5
987-1019
]
[
1998
82
2
2
354-64
]
[
1998
46
3
3
763-74
]
[
2011
9
4
4
807-14
]
[
1989
24
3
3
173-86
]
[
2002
29
01
01
21-38
]
[
2003
]
[
1988
36
2
2
273-85
]
[
1998
46
]
[
1977
25
1
1
13-37
]
[
1996
]
[
1991
60
2
2
441-53
]
[
2013
27
1-2
1-2
]
[
2011
108
3
3
1070-5
]
[
2005
308
5728
5728
1621-3
]
[
1997
44
45
45
537-48
]
[
2006
29
4
4
525-30
]
[
1987
83
83
]
[
2001
293
5530
5530
629-37
]
[
2001
58
1
1
157-70
]
[
2002
97
1
1
79-86
]
[
2002
96
1
1
82-91
]
[
2003
84
8
8
2155-67
]
[
2015
46
6
6
559-63
]
[
2012
93
6
6
1421-30
]
[
1976
4
4
4
373-400
]
[
2011
91
4
4
487-99
]
[
2005
111
1
1
112-8
]
[
2012
]
[
2005
50
1
1
70-85
]
[
1978
7
2
2
117-25
]
[
2000
57
3
3
649-58
]
[
2010
55
^ss1
^ss1
s1
205-22
]
[
2005
52
3
3
273-88
]
[
R Development Core Team
2008
]
[
1993
8
8
8
275-9
]
[
1982
52
4
4
395-414
]
[
2011
92
2
2
386-97
]
[
1991
42
5
5
603-14
]
[
2000
48
2-3
2-3
473-85
]
[
2002
83
5
5
1263-70
]
[
2002
33
1
1
341-70
]
[
2002
83
8
8
2152-61
]
[
2006
79
2
2
365-74
]
[
2003
12
7
7
1335-55
]
[
1968
49
1
1
153-6
]