1870-3453
1870-3453
S1870-34532018000300854
10.22201/ib.20078706e.2018.3.2244
El Salvador
00
00
2018
00
00
2018
89
3
854
864
[
2008
58
403-14
]
[
1996
]
[
1998
53
347-52
]
[
1994
75
1780-93
]
[
2000
54
912-23
]
[
2001
29
1260-70
]
[
2006
22
397-411
]
[
1995
52
936-49
]
[
1995
121
409-17
]
[
2017
32
860-71
]
[
2003
]
[
2002
]
[
2013
60
353-62
]
[
2001
49
307-14
]
[
2006
25
99-107
]
[
2015
40
492-501
]
[
2016
17
5-13
]
[
1987
40
63-72
]
[
2011
]
[
2017
15
]
[
1996
59
271-88
]
[
2012
335
687-97
]
[
1977
145-70
]
[
2011
59
1717-28
]
[
1993
]
[
2010
1-104
]
[
2003
63
831-47
]
[
2009
34
114-23
]
[
2012
62
539-48
]
[
1984
47
256-63
]
[
2011
91
487-99
]
[
1987
]
[
2005
15
239-43
]
[
1990
35
32-46
]
[
MARN
2006
]
[
MARN
SNET
2009
]
[
2012
22
351-65
]
[
2009
8
175-8
]
[
1988
39
565-7
]
[
1992
2
351-5
]
[
1999
56
410-3
]
[
2008
602
5-14
]
[
2013
40
894-904
]
[
2013
3608
440-56
]
[
2009
]
[
1997
126
397-417
]
[
1975
176
247-69
]
[
1993
37
47-55
]
[
2007
104
5732-7
]
[
2006
68
137-56
]
[
R Core Team
2013
]
[
2002
33
291-315
]
[
2010
8
841-9
]
[
2001
49
189-230
]
[
2000
287
1770-4
]
[
2007
57
91-103
]
[
1990
19-20
153-72
]
[
2014
84
897-912
]
[
2014
84
913-28
]
[
1999
47
1087-92
]
[
2010
467
555-61
]
[
2003
39
169-90
]
[
2008
107-46
]