http://qiserver.ugr.es/cod/2215044.cif
http://qiserver.ugr.es/cod/4342930.cif
http://qiserver.ugr.es/cod/4342931.cif
http://qiserver.ugr.es/cod/7105871.cif
http://qiserver.ugr.es/cod/9000452.cif
http://qiserver.ugr.es/cod/9002649.cif
http://qiserver.ugr.es/cod/9016383.cif