1816-8949
1816-8949
S1816-89492021000200159
10.18004/anales/2021.054.02.159
Paraguay
Paraguay
Paraguay
00
08
2021
00
08
2021
54
2
159
165
[
2004
]
[
2006
175-212
]
[
2009
5-6
]
[
1996
223-34
]
[
2005
57
1
1
125-33
]
[
1993
]
[
2004
]
[
1997
]
[
2011
]
[
1998
18
1
1
5-21
]
[
2011
]
[
1955
]
[
2021
]
[
1984
]
[
1929
8
11
11
]
[
1976
]
[
2011
]