http://qiserver.ugr.es/cod/1520871.cif
http://qiserver.ugr.es/cod/1521244.cif
http://qiserver.ugr.es/cod/1521445.cif
http://qiserver.ugr.es/cod/9009404.cif
http://qiserver.ugr.es/cod/9009405.cif
http://qiserver.ugr.es/cod/9011762.cif
http://qiserver.ugr.es/cod/9011763.cif
http://qiserver.ugr.es/cod/9011764.cif