1390-6542
1390-6542
S1390-65422018000400057
10.29019/enfoqueute.v9n4.399
Mexico
00
12
2018
00
12
2018
9
4
57
68
[
2002
37
2
2
175-95
]
[
2004
31
11
11
2251-64
]
[
2014
5
1
1
255-64
]
[
2008
2
3
3
031004
]
[
2001
6
2
2
161-9
]
[
2004
Berlin, Heidelberg
]
[
2017
]
[
OMS
2011
]
[
2017
33
1-2
1-2
138-53
]
[
2011
3
2
2
56-64
]
[
2016
104
31-42
]
[
1997
11
4
4
341-59
]
[
2016
8
6
6
061009
]
[
2015
]
[
2010
42
6
6
535-65
]