http://qiserver.ugr.es/cod/1535261.cif
http://qiserver.ugr.es/cod/1539091.cif
http://qiserver.ugr.es/cod/1542039.cif
http://qiserver.ugr.es/cod/2310860.cif
http://qiserver.ugr.es/cod/7234924.cif
http://qiserver.ugr.es/cod/8104454.cif
http://qiserver.ugr.es/cod/9000543.cif