0034-7744
0034-7744
S0034-77442019000601560
10.15517/rbt.v67i6.33635
Venezuela
Venezuela
00
12
2019
00
12
2019
67
6
1560
1571
[
2017
65
3
3
858-67
]
[
2007
71
4
4
793-800
]
[
1967
23
115-23
]
[
1974
]
[
1993
]
[
2008
60
282-6
]
[
1980
]
[
1983
]
[
2001
]
[
1986
44
747-58
]
[
1996
]
[
2001
35
3
3
272-82
]
[
2006
]
[
2017
51
1
1
43-58
]
[
2015
63
1
1
189-98
]
[
1971
]
[
1959
25
47-9
]
[
1975
]
[
1976
30
58-70
]
[
1973
13
2
2
69-76
]
[
1983
1
1
1
5-6
]
[
2005
76
1
1
73-93
]
[
1999
]
[
1965
5
2
2
103-5
]
[
2007
71
3
3
429-40
]
[
1979
1
1-35
]
[
1980
39
2
2
175-92
]
[
1983
]
[
1981
28
4
4
]
[
2000
]
[
2001
68
1
1
1-12
]
[
1979
175
167-9
]
[
1975
191
382
]
[
1989
]
[
2008
287-96
]
[
2013
73
2
2
383-90
]
[
2013
73
2
2
391-6
]
[
1997
]
[
1958
23
366-70
]
[
2012
4
157-68
]
[
2013
1a
]
[
1938
10
2
2
181-213
]
[
2007
]
[
1986
4
12-4
]
[
2009
]