2393-6606
2393-6606
S2393-66062017000300033
10.22235/ech.v6i2.1463
Spain
Spain
00
12
2017
00
12
2017
6
2
33
48
[
2009
]
[
2004
]
[
2015
]
[
2011
19
5
5
9-13
]
[
2009
]
[
2011
1
23
23
]
[
1992
l4
4
4
488-509
]
[
2000
4
7/8
7/8
172-80
]
[
2011
19
5
5
1096-105
]
[
2014
18
38
]
[
2016
23
2
2
154-66
]
[
1986
]
[
1996
91
26
26
40-1
]
[
1991
16
1
1
74-81
]
[
1992
]
[
1998
27
1
1
147-56
]
[
2009
9
3
3
246-56
]
[
1994
8
6
6
292-3
]
[
1998
28
1191-4
]
[
2014
18
39
39
14-29
]
[
2010
28
1
1
120-8
]
[
2004
]
[
2012
17
3
3
613-9
]
[
1994
]
[
2002
60
17-39
]
[
2014
17
10
10
12-6
]