http://qiserver.ugr.es/cod/1537765.cif
http://qiserver.ugr.es/cod/1537767.cif
http://qiserver.ugr.es/cod/1538034.cif
http://qiserver.ugr.es/cod/1538036.cif
http://qiserver.ugr.es/cod/1538039.cif
http://qiserver.ugr.es/cod/2002414.cif