1688-7026
1688-7026
S1688-70262020000300063
10.26864/pcs.v10.n3.5
Ecuador
00
00
2020
00
00
2020
10
3
63
78
[
2015
]
[
2013
201
4
4
304-10
]
[
1998
Vol. 1
]
[
2015
]
[
2006
23
2
2
205-29
]
[
2010
31
1
1
18-33
]
[
2015
]
[
2010
6
11
11
65-73
]
[
2015
74
208-13
]
[
2013
Seventh Ed
]
[
2016
51
5
5
661-80
]
[
2011
48
5
5
582-9
]
[
1970
57
57
]
[
1999
]
[
2001
39
2
2
132-9
]
[
1997
27
2
2
333-42
]
[
2012
]
[
1979
52
1-10
]
[
2016
19
35
35
14-24
]
[
2018
27
27
2112-24
]
[
2007
2 ed.
650-77
]
[
2004
2a ed.
]
[
2007
7
1
1
]
[
2009
43
4
4
348-54
]
[
2018
25
6
6
716-28
]