1405-6666 1405-6666 S1405-66662007000300895 Argentina 00 09 2007 00 09 2007 12 34 895 919

1992 2000 2002 Universidad de Costa Rica 1999 LXIX 29 29 2002 1985 2006 1993 23-24 23-24 265-92 1998 2000 1999 2002 1993 1994 1995 3 1 1 2005 2006 Buenos Aires 2004 25 25 1994 2006 Buenos Aires 1997 2001 1996 2002 2002 2002 1992 36-37 36-37 1991 4 4 1996 2002 1999 1998 95 95 1996 2003 17 17 2006 7 7 2006 Buenos Aires 1991 1987 1992 1993