1409-3871
1409-3871
S1409-38712018000200103
10.15517/lank.v18i2.34050
Ecuador
Ecuador
Ecuador
Ecuador
USA
00
08
2018
00
08
2018
18
2
103
109
[
2016
33
2
2
123-39
]
[
1986
20
1-57
]
[
1988
3
3
3
133-49
]
[
2005
103
1-311
]
[
1998
21
1
1
72-108
]
[
2011
]
[
2001
88
12
12
2286-308
]
[
2005
]
[
2011
11
3
3
369
]
[
2013
13
1-2
1-2
139
]
[
2016
16
3
3
349-50
]