1607-4041
1607-4041
S1607-40412020000100109
10.24320/redie.2020.22.e09.2284
Ecuador
Cuba
00
00
2020
00
00
2020
22
[
2017
31
2
2
]
[
2005
]
[
2014
24
4
4
586-607
]
[
2004
]
[
2013
7a
]
[
1990
]
[
2014
7
2
2
]
[
1982
144-54
]
[
2015
2
2
11-7
]
[
2016
]
[
2017
44-5
]
[
2014
6a
]
[
2017
66
1
1
115-7
]
[
2017
15
6
6
]
[
2016
36
36
141-51
]
[
1985
]
[
1987
]
[
2015
11
1
1
]
[
2017
66
1
1
118-20
]
[
2000
21
21
109-18
]
[
2014
17
1
1
221-42
]
[
2010
]
[
2017
1
1
111-29
]