http://qiserver.ugr.es/cod/1511339.cif
http://qiserver.ugr.es/cod/1511451.cif
http://qiserver.ugr.es/cod/1523256.cif
http://qiserver.ugr.es/cod/1523649.cif
http://qiserver.ugr.es/cod/1525129.cif
http://qiserver.ugr.es/cod/1537740.cif
http://qiserver.ugr.es/cod/1538977.cif
http://qiserver.ugr.es/cod/1539744.cif