http://qiserver.ugr.es/cod/1529813.cif
http://qiserver.ugr.es/cod/1535818.cif
http://qiserver.ugr.es/cod/1537228.cif
http://qiserver.ugr.es/cod/1537231.cif
http://qiserver.ugr.es/cod/1539307.cif