2393-6606
2393-6606
S2393-66062019000100022
10.22235/ech.v8i1.1795
Venezuela
00
06
2019
00
06
2019
8
1
22
34
[
2008
24
2
2
]
[
2006
32
1
1
123-5
]
[
2004
30
2
2
]
[
]
[
2010
14
2
2
166-74
]
[
1997
]
[
1986
]
[
1991
]
[
1978
]
[
2006
17
2
2
]
[
2008
34
1
1
]
[
2002
]
[
1999
]
[
2006
15
158-63
]
[
2003
]
[
2007
]
[
2002
26-7
]
[
2009
3
]
[
1968
14
14
14
103
]
[
2007
]
[
1984
6
99-116
]
[
2006
15
71-6
]
[
2000
13
13
]
[
2005
14
14
111-9
]
[
2009
5
3
3
391-401
]
[
2011
10
21
21
]