1390-6542
1390-6542
S1390-65422018000400110
10.29019/enfoqueute.v9n4.404
Mexico
00
12
2018
00
12
2018
9
4
110
119
[
2000
39
2
2
205-18
]
[
2006
45
1
1
109-18
]
[
1967
]
[
2002
]
[
2018
]
[
2015
]
[
1984
40
2
2
421-34
]
[
1991
]
[
1985
2
4
4
329-52
]
[
1977
22
2
2
212-22
]
[
2002
8
4-5
4-5
451-73
]
[
1992
]
[
2015
]
[
2009
56
9
9
3275-85
]