1405-6666 1405-6666 S1405-66662006000300867 Spain 00 09 2006 00 09 2006 11 30 867 882

1999 1995 2002 1991 1998 2000 1996 1999 2002 20 2 2 209-16 2004 2003 12 27-43 2004 1996 1998 1998 1981 1999 1997 6 555-72 1999