0034-7426
0034-7426
S0034-74262018000200171
10.15446/recolma.v52n2.77157
Ecuador
Venezuela
Venezuela
00
12
2018
00
12
2018
52
2
171
184
[
1998
]
[
1994
5
1
1
139-44
]
[
2006
9
53-62
]
[
2016
]
[
2016
]
[
2007
66
547-67
]
[
2015
107-21
]
[
2015
]
[
2000
]
[
1998
39
129-33
]
[
1906
369-90
]
[
2012
]
[
1934
]
[
2001
]
[
1941
27
222-4
]
[
1952
3
821-8
]
[
2013
1
2
2
253-64
]
[
2013
86
4
4
727-6
]
[
2014
43
6
6
935-42
]
[
1996
60
778-9
]
[
2001
]
[
2009
Second
]
[
2010
80
1
1
193-9
]
[
2015
1
1
1
9-11
]
[
2006
23
]
[
1995
49
160-4
]
[
2014
17
1
1
51-61
]
[
2014
]
[
1966
166
287-90
]
[
1973
]
[
1976
14
888-98
]
[
1960
]
[
2007
326
303-11
]
[
2013
16
3
3
399-407
]