2076-054X 2076-054X S2076-054X2016004200067 10.18004/pdfce/2076-054x/2016.022(42)067-080 Paraguay 00 06 2016 00 06 2016 22 42 67 80

1988 411 - 423 2007 815 - 824 2005 2004 2003 2001 1986 1966 1998 295 - 336 2000 1 - 78 1987 2010 2011 1982 1 - 54