1659-4266
1659-4266
S1659-42662015000200305
Costa Rica
Costa Rica
Costa Rica
Costa Rica
00
12
2015
00
12
2015
7
2
305
311
[
2010
38
3-5
]
[
2002
]
[
1994
62
11-22
]
[
2000
]
[
2009
73
3
3
433-41
]
[
1992
91
]
[
2009
]
[
2000
b
14
6
6
1580-91
]
[
2009
25
563-7
]
[
2000
a
249
]
[
2005
309
603-7
]
[
1997
45
3
3
1223-9
]
[
1996
2
243-66
]
[
2011
333
301-6
]
[
2009
8
1
1
19-27
]
[
2001
33
4
4
691-6
]
[
2010
42
126-33
]
[
2005
]
[
1986
75
105-16
]
[
1988
]
[
2004
110
14
14
4854-8
]
[
2012
59
]
[
2011
27
3
3
757-76
]
[
2005
267
167-78
]
[
R Development Core Team
2011
]
[
2010
143
939-45
]
[
1986
210
149-59
]
[
2003
77
]
[
2012
02
11-3
]
[
2007
38
514-9
]
[
2000
1
80-3
]
[
2002
127-38
]
[
2007
41
1
1
51-6
]
[
1989
1
164-1182
]
[
2002
58
41-56
]
[
1980
12
3
3
163-8
]
[
2003
259
269-79
]
[
1989
340
1-9
]
[
2004
38
2
2
1-7
]
[
2006
129
487-96
]
[
2002
]
[
2006
38
5
5
667-90
]