http://qiserver.ugr.es/cod/1521712.cif
http://qiserver.ugr.es/cod/1521713.cif
http://qiserver.ugr.es/cod/1521714.cif
http://qiserver.ugr.es/cod/1521715.cif
http://qiserver.ugr.es/cod/1521716.cif
http://qiserver.ugr.es/cod/1521717.cif
http://qiserver.ugr.es/cod/1522060.cif