http://qiserver.ugr.es/cod/1531135.cif
http://qiserver.ugr.es/cod/1541688.cif
http://qiserver.ugr.es/cod/1541757.cif
http://qiserver.ugr.es/cod/1541839.cif
http://qiserver.ugr.es/cod/9017907.cif