1659-3820 1659-3820 S1659-38202018000200069 10.18845/rc.v27i2.4008 Costa Rica 00 12 2018 00 12 2018 27 2 69 78

2007 2002 439-94 1861 2003 45 85-99 2010 19 79-88 2015 24 1 1 4-22 2006 2002 95-210 1968 1991 2013 1 2007