1659-4266
1659-4266
S1659-42662021000100009
10.22458/urj.v13i1.3303
El Salvador
Australia
USA
Mexico
00
06
2021
00
06
2021
13
1
[
2013
66
3
3
1011-26
]
[
2017
15
3
3
]
[
2018
13
6
6
]
[
2013
9
5
5
987-1019
]
[
2015
112
19
19
6110-5
]
[
2015
10
4
4
]
[
1984
33
4
4
428-35
]
[
1990
38
2
2
487-90
]
[
1981
1
25-32
]
[
1985
453-73
]
[
2002
]
[
2008
56
2
2
829-38
]
[
2020
68
4
4
]
[
2020
]
[
2000
130
1
1
1-53
]
[
1861
13
3-6
]
[
2018
89
3
3
854-64
]
[
2019
4559
2
2
281-313
]
[
1925
41
237-87
]
[
2016
101
32-45
]
[
2007
43
3
3
986-98
]
[
1924
16
1-86
]
[
1999
238
1-95
]
[
2006
48
791-827
]
[
2003
555-81
]
[
2009
2307
1
1
1-38
]
[
2012
22
1
1
351-65
]
[
2012
227
227
227
49-62
]
[
2015
31
2
2
177-88
]
[
2018
106
2
2
239-46
]
[
2002
56
5
5
972-84
]
[
2013
3608
6
6
440-56
]
[
1904
]
[
1912
10
7
7
69-75
]
[
1966
4
773-802
]
[
1974
17
235-50
]
[
1979
1979
1
1
82-91
]
[
2009
]
[
2012
10
1
1
19-44
]
[
2016
94
242-51
]
[
1966
4
766-73
]
[
2004
]
[
2016
]
[
2013
8
8
8
]
[
2016
103
230-44
]
[
1981
168
4
4
335-557
]
[
1999
604
1-32
]
[
1981
29
1
1
45-58
]
[
1995
64
4
4
239-52
]
[
2003
]
[
2011
3
418-22
]
[
1913
5
83
83
977-1018
]
[
2017
12
3
3
]
[
2015
]
[
1963
126
1
1
1-76
]
[
1975
24
4
4
431-64
]
[
2014
10
6
6
1507-13
]
[
1971
2
282-90
]
[
2017
66
2
2
183-96
]