2237-9460 2237-9460 S2237-94602019000300395 10.24065/2237-9460.2019v9n3id924 Brazil Brazil Brazil 00 07 2019 00 07 2019 9 3 395 424

2014 BRASIL 2000 BRASIL 2007 BRASIL 2012 BRASIL 2013 2009 2 132-44 2015 8 1 1 3-12 1994 2002 2 2005 41 2013 5 234-50 2002 2 35-9 2002 4 2011 2017 1976 2005 4 2010 3 178-95 2013 27 46 46 481-96 2003 9 2 2 191-211 Instituto de Física - UFRGS 2003 2012 2 114-28 1970 2005 1 1 1 3-15 2008 10 1 1 9-40 2011 112-20 2016 7 378-87 2014 2 134-42