1390-4299
1390-4299
S1390-42992018000100024
10.17141/urvio.22.2018.3191
Ecuador
00
06
2018
00
06
2018
22
24
40
[
2014
]
[
2011
60
145
145
33-53
]
[
2005
]
[
2012
1
1
1-26
]
[
2016
1
1
1-26
]
[
1981
2
10
10
126-55
]
[
2009
190-209
]
[
2010
]
[
1989
]
[
2001
]
[
2006
177-205
]
[
2013
3
19
19
405-25
]
[
1994
]
[
1999
]
[
2003
15
15
74-87
]
[
2009
28
28
11-41
]
[
1993
]
[
1987
]
[
2004
395-408
]
[
2010
]
[
1998
]
[
2013
116
116
11-41
]
[
2002
]
[
2002
3
17
17
87-104
]
[
2000
]
[
2014
24
24
89-107
]
[
2015
1
16
16
32-9
]
[
2014
1
4
4
1-6
]
[
2010
19
19
1-73
]
[
2006
403-10
]
[
1999
]
[
2005
]
[
2006
35-45
]
[
2012
2
27
27
172-86
]
[
2009
]
[
2006
]
[
2002
]