http://qiserver.ugr.es/cod/1511124.cif
http://qiserver.ugr.es/cod/1521771.cif
http://qiserver.ugr.es/cod/1527946.cif
http://qiserver.ugr.es/cod/1532738.cif
http://qiserver.ugr.es/cod/1541554.cif