2409-8752 2409-8752 S2409-87522017000100029 10.18004/ucsa/2409-8752/2017.004(01)029-036 Paraguay 00 04 2017 00 04 2017 4 1 29 36

2000 1996 37 2 2 279-95 2008 33 11 11 1998 317 97-120 2015 13 1 1 983-1001 2013 9 2 2 2007 October, 25th-28th, 2006 Mérida, SPAIN 2001 8 3 3 289-303 2004 2015 1 28 28 1-7 2016 11 2 2 111-20 2015 11 5 5 Universidad Nacional de Asunción 2010