0034-7744
0034-7744
S0034-77442015000500287
10.15517/rbt.v63i1.23108
Costa Rica
Costa Rica
Costa Rica
00
04
2015
00
04
2015
63
287
298
[
1989
31
21-4
]
[
2004
25
3
3
185-95
]
[
1982
30
1-4
]
[
1983
31
175-9
]
[
1984
32
1
1
45-50
]
[
1994
]
[
1995
31
406-10
]
[
1998
37
8-12
]
[
2010
45
3
3
541-546.
]
[
2012
60
1
1
203-17
]
[
2013
48
2
2
321-34
]
[
2001
63
1
1
1-39
]
[
2011
]
[
2013
42
2
2
215-31
]
[
2009
40-55
]
[
2011
40-54
]
[
2012
España
]
[
2004
52
2
2
195-201
]
[
2001
49
2
2
315-20
]
[
1975
18
57-68
]
[
StataCorp
2005
]
[
2006
54
1
1
87-99
]
[
1994
]