1816-8949
1816-8949
S1816-89492020000100093
10.18004/anales/2020.053.01.93-100
Paraguay
00
04
2020
00
04
2020
53
1
93
100
[
2019
283
145-53
]
[
2016
19
4
4
270-6
]
[
1998
1
3
]
[
2000
57
1-3
1-3
267-72
]
[
2011
302
]
[
2016
61
10
10
663-8
]
[
2002
3
2
2
167-78
]
[
2007
10
5
5
713-6
]
[
2007
10
2
2
204-14
]
[
2017
]
[
2017
257
163-71
]
[
2019
47
1
1
71-83
]
[
2018
7
4
4
953-64
]
[
123
14
14
1904-8
]
[
2010
485
2
2
138-42
]
[
2011
79
1
1
92-5
]
[
2012
6
3
3
191-5
]
[
2008
1
3
3
133-8
]
[
2003
6
2
2
143-50
]
[
2013
2
4
4
209-15
]