http://qiserver.ugr.es/cod/1520774.cif
http://qiserver.ugr.es/cod/1520964.cif
http://qiserver.ugr.es/cod/1526474.cif
http://qiserver.ugr.es/cod/1534814.cif
http://qiserver.ugr.es/cod/1536116.cif
http://qiserver.ugr.es/cod/1536120.cif
http://qiserver.ugr.es/cod/1536124.cif