2550-6722
2550-6722
S2550-67222019000200052
Ecuador
Venezuela
00
08
2019
00
08
2019
8
52
64
[
2006
9
]
[
1996
]
[
1988
]
[
2016
1
93-100
]
[
2003
18
46-53
]
[
1977
]
[
2000
]
[
2000
]
[
1991
]
[
2000
]
[
2007
]
[
2012
]
[
2004
]
[
1992
]
[
2018
6
136-48
]
[
1996
]
[
Universidad Pedagógica Experimental Libertador
2000
]