1816-8949
1816-8949
S1816-89492021000300167
10.18004/anales/2021.054.03.167
Paraguay
Paraguay
00
12
2021
00
12
2021
54
3
167
172
[
2010
126
238-9
]
[
2009
54
411-20
]
[
2007
120
1667-73
]
[
2004
28
127-42
]
[
2001
21
1
1
68-80
]
[
2012
27
2
2
266-71
]
[
2008
34
1
1
51-60
]
[
2008
28
2
2
211-6
]
[
2003
23
486-94
]
[
2006
8
186-90
]
[
2002
26
3
3
172-80
]
[
2004
24
75-8
]
[
2005
25
521-3
]
[
2010
30
154-60
]
[
2008
10
2
2
79-83
]