2007-7858
2007-7858
S2007-78582014000200006
México
USA
00
06
2014
00
06
2014
8
2
6
10
[
2010
20
6
6
491-7
]
[
2010
16
2
2
253-60
]
[
2010
49
493-520
]
[
2011
18
207-15
]
[
2011
334
787-91
]
[
2008
197
2
2
299-316
]
[
2005
72
1-16
]
[
1996
17
419-24
]
[
2003
87
273-82
]
[
2007
12
13-32
]
[
2001
10
263-5
]
[
2011
38
16
]
[
2011
14
3
3
255-63
]
[
2003
164
1-20
]
[
2012
33
1
1
63-8
]
[
2012
195-200
]
[
2012
3
13
13
95-102
]
[
2012
3
9
9
1034-8
]
[
2013
4
1-2
]
[
2002
17
539-57
]
[
SAS, Statistical Analysis System
2004
]
[
2001
]
[
2006
]
[
1988
64
182-5
]
[
2012
39
6
6
1431-46
]
[
1993
Norman, OK
52-7
]
[
1998
53
315-24
]
[
2011
31
1074-87
]
[
2010
91
1660-71
]