1816-8949
1816-8949
S1816-89492017000200017
10.18004/anales/2017.050(02)17-022
Paraguay
Paraguay
Paraguay
Paraguay
00
08
2017
00
08
2017
50
2
17
22
[
2013
20
6
6
672-6
]
[
2006
32
2
2
87-102
]
[
2007
14
86-93
]
[
2013
]
[
2007
25
2
2
105-12
]
[
2012
1ª ed
129-48
]
[
2008
23
1
1
7-18
]
[
2003
16
102-11
]
[
2015
13
3
3
607-30
]
[
2016
13
5
5
529-44
]
[
2010
]
[
2012
30
3
3
49-55
]
[
2010
6
2/3
2/3
215-26
]
[
2013
21
1
1
31-7
]
[
2010
4
2
2
88-93
]
[
2008
11
4
4
11
]
[
2012
28
4
4
340-6
]
[
2011
13
6
6
908-20
]