1659-2859 1659-2859 S1659-28592017000200011 10.15517/rr.v96i2.32077 Costa Rica Costa Rica 00 12 2017 00 12 2017 96 2 11 19

2007 2006 2009 1989 2000 25/26 2008 2001 2000 29-37 2008 63-80 1981 Novena 2002 19 19 2007 2000 2006 2011 2001 42-56 2003 2012