2393-6606
2393-6606
S2393-66062017000100019
10.22235/ech.v6i1.1366
España
España
00
06
2017
00
06
2017
6
1
19
24
[
2008
18
6
6
317-20
]
[
2013
12
31
31
443-51
]
[
2010
14
56
56
18-23
]
[
2005
76
5
5
530-5
]
[
1997
1
200-7
]
[
1997
1
355-61
]
[
2003
21
27-41
]
[
2013
40
1
1
48-54.
]
[
2014
37
2
2
203-11
]
[
2014
14
3
3
327-35
]
[
2013
10
41
41
]
[
2014
15
5
5
]
[
2014
10
3
3
]
[
2000
]
[
2010
5
]
[
2015
29
1
1
4-9
]
[
2013
7
18
18
]
[
2014
59
2
2
120-6
]
[
2011
34
3
3
]
[
2013
7
]
[
2013
7
19
19
]
[
2012
6
16
16
]
[
1999
24
6
6
337-43
]
[
2011
12
1
1
3-8
]
[
2016
387
10017
10017
]