1134-8046
1134-8046
S1134-80462019000500006
10.20986/resed.2019.3732/2019
Cuba
Cuba
Ecuador
Cuba
00
10
2019
00
10
2019
26
5
276
283
[
1965
150
3699
3699
971-9
]
[
2017
45
4
4
310-6
]
[
2015
15
4
4
461-74
]
[
2005
12
1
1
8-16
]
[
1985
20
1
1
3-26
]
[
1987
31
1
1
53-64
]
[
2002
9
1
1
13-22
]
[
2004
11
7
7
27-34
]
[
2014
6
1
1
112-25
]
[
2016
6
1
1
49-58
]
[
2008
6
1
1
27-36
]
[
2007
]
[
2017
9
2
2
42-53
]
[
2014
28
3
3
547-58
]
[
2017
24
5
5
224-33
]
[
2011
18
2
2
77-83
]