2588-0934
2588-0934
S2588-09342020000100033
10.37785/nw.v4n1.a2
Ecuador
00
06
2020
00
06
2020
4
1
33
45
[
2017
5
1
1
91-101
]
[
2003
]
[
2011
47
47
75-8
]
[
2001
7
7
1-4
]
[
1981
11
3
3
2-10
]
[
2017
]
[
2010
]
[
2012
]
[
1974
10
2
2
34-9
]
[
1987
]
[
1997
]
[
1991
]
[
2010
]
[
1999
]
[
1994
]
[
1998
11
11
15-25
]
[
1975
]
[
1997
3
3
4-16
]