1794-192X
1794-192X
S1794-192X2020000100045
10.21500/22563202.4526
Ecuador
00
06
2020
00
06
2020
18
1
45
54
[
2007
19
1
1
150-5
]
[
2017
17
1
1
51-8
]
[
2011
27
2
2
536-43
]
[
1996
2
1-8
]
[
1977
84
2
2
191-215
]
[
2005
5
1-2
1-2
246-55
]
[
2003
15
2
2
273-7
]
[
2006
]
[
2002
14
2
2
323-32
]
[
2017
112
112
14-28
]
[
2004
16
1
1
104-9
]
[
2013
09
77-9
]
[
2009
10
2
2
271-8
]
[
2010
138
551-7
]
[
2003
25
519-33
]
[
2019
1
2
2
71-83
]
[
2016
16
2
2
51-64
]
[
2017
26
2
2
199-209
]
[
2015
31
1
1
355-66
]
[
2009
22
2
2
153-66
]
[
2007
3
9
9
21-32
]
[
2013
10
2
2
1-16
]
[
2006
15
1
1
71-93
]
[
2011
20
1
1
13-28
]
[
2014
23
2
2
311-24
]
[
2015
63
5
5
791-807
]
[
IBM Corp
2012
]
[
2013
29
2
2
462-9
]
[
2014
23
2
2
451-6
]
[
2008
9
4
4
413-26
]
[
2016
21
6
6
603-15
]
[
2006
6
2
2
359-78
]
[
1990
117-213
]
[
2016
16
2
2
13-20
]
[
2019
11
2
2
193-204
]
[
2007
13
1
1
9-15
]
[
2009
9
64
]
[
2013
29
3
3
637-41
]
[
2017
35
1
1
227-32
]
[
2016
21
1
1
1-8
]
[
2015
15
2
2
55-70
]
[
2007
16
2
2
137-50
]
[
2016
11
2
2
193-200
]
[
2017
3
3
3
436-53
]
[
2004
18
18
67-75
]
[
2014
14
55
55
561-76
]
[
2006
31
1
1
11-22
]
[
2015
10
1
1
77-84
]
[
2016
30
30
110-3
]
[
2017
416
416
35-50
]
[
2017
26
4
4
39-44
]
[
2006
6
3
3
613-30
]
[
2000
12
2
2
509-13
]
[
2016
25
1
1
51-6
]
[
2007
]
[
2007
13
13
41-56
]
[
2014
33
11
11
1298
]
[
2017
12
35
35
135-42
]