http://qiserver.ugr.es/cod/1520793.cif
http://qiserver.ugr.es/cod/1520970.cif
http://qiserver.ugr.es/cod/1521071.cif
http://qiserver.ugr.es/cod/1521329.cif
http://qiserver.ugr.es/cod/1521395.cif
http://qiserver.ugr.es/cod/1521769.cif
http://qiserver.ugr.es/cod/1521770.cif
http://qiserver.ugr.es/cod/1521861.cif
http://qiserver.ugr.es/cod/1522124.cif