1607-4041 1607-4041 S1607-40412017000200143 10.24320/redie.2017.19.2.1103 00 06 2017 00 06 2017 19 2 143 157

2007 1998 14 33-40 2000 2004 2011 2001 2010 21-86 2014 280 86-9 1999 2005 1998 2008 2008 1997 2000 2014 76 11-6 2012 1994 2009 13-44 2007 21-42 2009 340 31-55 1990 1999 1998 10 70-81 2002 153-62 2014 Oporto, Portugal 2013 Madrid 2010 1998 2011 1998 2003 2014 2007