http://qiserver.ugr.es/cod/9011832.cif
http://qiserver.ugr.es/cod/9011833.cif
http://qiserver.ugr.es/cod/9013428.cif
http://qiserver.ugr.es/cod/9013945.cif
http://qiserver.ugr.es/cod/9015940.cif