0300-9041 0300-9041 S0300-90412020000800002 10.24245/gom.v88i8.2838 Spain Spain 00 00 2020 00 00 2020 88 8 499 507

1 1994 266 66-71 2 1995 378 789-92 3 2006 296 185-92 4 2003 72 1117-30 5 1998 62 676-89 6 1997 336 1401-8 7 1997 15 103-5 8 1997 277 997-1003 9 1999 353 1207-10 10 2000 77 350-6 11 2002 12 86-9 12 2002 346 1616-22 13 2002 346 1609-15 14 2006 100 58-64 15 2005 23 127-32 16 2007 25 2921-7 17 2006 24 49S 18 2000 18 2728-32 19 2006 30 1222-30 20 2000 21 578-82 21 2004 90 1492-7 22 1997 60 1031-40 23 1999 45 976-81 24 2000 12 58-9 25 2000 77 319-20 26 2000 78 263-4 27 2000 76 45-50 28 2002 26 171-8 29 2009 19 826-9 30 1996 83 986 31 2008 78 670-2