1816-8949
1816-8949
S1816-89492020000200157
10.18004/anales/2020.053.02.157
Paraguay
00
08
2020
00
08
2020
53
2
157
164
[
2013
88
3
3
329-43
]
[
2013
34
12
12
2250-1
]
[
2014
13
8
8
834-43
]
[
2019
139
643-65
]
[
2010
178
5
5
1932-9
]
[
2012
17
101-116
101-116
]
[
2016
73
3
3
188-95
]
[
2011
8
2
2
63-74
]
[
2001
21
3
3
601-12
]
[
2016
14
1
1
]
[
2015
4
2
2
16-21
]
[
2018
97
20
20
1-3
]
[
2014
40
1
1
42-4
]
[
2012
199
1
1
99-106
]
[
2015
27
1
1
45-8
]
[
2009
70
3
3
211-6
]
[
2013
28
6
6
361-5
]