http://qiserver.ugr.es/cod/2101559.cif
http://qiserver.ugr.es/cod/2107013.cif
http://qiserver.ugr.es/cod/7011106.cif
http://qiserver.ugr.es/cod/8104520.cif
http://qiserver.ugr.es/cod/9008086.cif
http://qiserver.ugr.es/cod/9009567.cif
http://qiserver.ugr.es/cod/9012422.cif