1409-4703
1409-4703
S1409-47032018000200383
10.15517/aie.v18i2.33175
Ecuador
Ecuador
Cuba
Cuba
00
08
2018
00
08
2018
18
2
383
411
[
1997
]
[
1996
]
[
1999
3ra
]
[
2002
]
[
2015
12
22
22
18-41
]
[
2012
14
2
2
1-13
]
[
2016
]
[
2012
10
1
1
43-66
]
[
1997
6
]
[
2015
57
57
99-113
]
[
1997
108-41
]
[
1968
]
[
1968
]