0034-7744
0034-7744
S0034-77442019000601180
10.15517/rbt.v67i6.35023
USA
USA
Costa Rica
00
12
2019
00
12
2019
67
6
1180
1193
[
1988
23
123-6
]
[
2009
44
1
1
145-52
]
[
2011
]
[
2011
]
[
2012
167-78
]
[
2012
31
1
1
2-7
]
[
33
3
3
283-7
]
[
1989
]
[
2016
]
[
2005
40
2
2
133-40
]
[
1977
]
[
1997
31
514-20
]
[
2004
248-56
]
[
1976
]
[
2003
2
1
1
136-40
]
[
1993
17
1
1
7-24
]
[
IBM Corp
2013
]
[
INDER
2016
]
[
1990
313-54
]
[
1986
]
[
1981
]
[
1981
]
[
2015
103
3
3
241-545
]
[
2015
]
[
2000
]
[
1998
]
[
1991
]
[
2001
]
[
1996
44
2
2
835-40
]
[
2017
31
1
1
13-22
]
[
1992
40
131-4
]
[
1992
]
[
2012
4
2
2
191-202
]
[
2015
49
349-57
]