1870-249X
1870-249X
S1870-249X2020000100014
10.29356/jmcs.v64i1.720
Canada
Ecuador
00
03
2020
00
03
2020
64
1
14
29
[
2001
]
[
1954
46
1485-90
]
[
1999
3-18
]
[
1992
277-308
]
[
2009
91
50-4
]
[
2003
71
247-68
]
[
2006
52
241-52
]
[
2007
179
73-8
]
[
1972
4
217-29
]
[
1987
269-93
]
[
2018
1-8
]
[
1981
3
79-95
]
[
2015
144
50-5
]
[
2009
397-408
]
[
1973
28
1071-80
]
[
2013
]
[
2015
]
[
2008
]
[
1982
8
373-468
]
[
2004
]
[
2007
88
]
[
1979
20
225-8
]
[
1995
24-7
]
[
1967
24
433-40
]
[
2009
122
99-104
]
[
2006
252
8057-61
]
[
1999
63
3133-43
]
[
2004
17
865-78
]
[
2006
45
199-206
]
[
2015
482
290-9
]
[
2000
58
267-304
]
[
2012
3
203-14
]
[
2006
34
105-24
]
[
2000
58
223-36
]
[
1987
4
175-85
]
[
2000
60
143-52
]
[
1976
57
132-42
]
[
1985
278
13-9
]
[
1995
12
219-24
]
[
1998
15
24-8
]
[
2018
125
10-4
]
[
2006
31
56-64
]
[
2003
260
251-8
]
[
1985
2
19-33
]
[
2004
271
145-56
]
[
1942
64
2716-8
]
[
1968
6
1535-49
]
[
2013
124
50-7
]
[
1977
58
390-407
]
[
2007
46
321-7
]
[
1993
34
592-6
]
[
1998
34
13-6
]