1816-8949
1816-8949
S1816-89492019000300017
10.18004/anales/2019.052.03.17-024
Paraguay
Venezuela
Venezuela
Paraguay
Paraguay
00
12
2019
00
12
2019
52
3
17
24
[
1974
9
389-98
]
[
2006
41
1513-15136
]
[
1998
33
171-6
]
[
2006
41
388-93
]
[
2006
41
1517-21
]
[
1989
160
1145-50
]
[
2004
19
319-26
]
[
2000
35
322-5
]
[
2011
46
1182-5
]
[
2011
46
1325-32
]
[
2011
31
678-88
]
[
2006
41
2
2
388-93
]
[
2014
43
611-9
]
[
2011
31
678-88
]
[
2001
184
503-7
]
[
2002
22
99-101
]
[
2012
32
1127-32
]
[
2015
46
627-8
]
[
2016
47
6
6
712-9
]