1659-4266
1659-4266
S1659-42662019000300345
10.22458/urj.v11i3.2619
Costa Rica
Costa Rica
Costa Rica
00
12
2019
00
12
2019
11
3
345
351
[
1998
]
[
2011
]
[
2004
]
[
2002
]
[
2003
]
[
2005
]
[
2006
]
[
2009
]
[
1983
]
[
1996
]
[
2005
]
[
2011
]
[
2011
]
[
1981
]
[
2010
]
[
2013
]
[
2009
]
[
2010
]
[
2012
]
[
2011
]
[
2007
]
[
2011
]
[
2016
]
[
SAS Institute
2012
]