1409-2433
1409-2433
S1409-24332020000200383
10.15517/rmta.v27i2.33677
Costa Rica
00
12
2020
00
12
2020
27
2
383
404
[
2006
]
[
2002
]
[
1998
3
4
4
424-53
]
[
1992
112
2
2
351-62
]
[
1969
34
2
2
183-202
]
[
2009
2nd. Ed.
]
[
2009
63
2
2
155-62
]
[
2017
8
1286-98
]
[
2009
]
[
1989
105
430-45
]
[
2011
46
2
2
202-28
]
[
R Development Core Team.
2007
]
[
2014
]
[
2012
48
2
2
1-35
]