0301-7036
0301-7036
S0301-70362018000300143
10.22201/iiec.20078951e.2018.194.62222
Spain
00
09
2018
00
09
2018
49
194
143
167
[
2013
]
[
2013
]
[
1992
100
2
2
]
[
2013
37
3
3
]
[
2015
3
4
4
]
[
2017
36
71
71
]
[
2001
]
[
1991
]
[
2017
26
2
2
]
[
1972
]
[
1987
55
2
2
]
[
2013
]
[
1969
37
3
3
]
[
1974
2
2
2
]
[
2002
]
[
1995
]
[
1966
]
[
2000
3
2
2
]
[
2003
115
1
1
]
[
2015
]
[
2016
]
[
1957
67
268
268
]
[
1999
90
1
1
]
[
1998
4
2
2
]
[
2012
]
[
2016
47
185
185
]
[
1999
61
^s1
^s1
1
]
[
1974
]
[
1974
]
[
2006
]
[
2006
]
[
2015
]
[
2017
48
191
191
]
[
1977
]
[
2007
25
1
1
]
[
2009
119
538
538
]
[
1978
]
[
1999
61
^s1
^s1
1
]
[
2001
]
[
1973
]
[
2016
]
[
1981
13
4
4
]
[
2015
48
3
3
]
[
1991
]
[
2016
]
[
2014
]
[
2003
27
6
6
]
[
1993
61
4
4
]
[
2013
17
4
4
]
[
2016
32
5
5
]
[
2009
]