http://qiserver.ugr.es/cod/1539719.cif
http://qiserver.ugr.es/cod/1539900.cif
http://qiserver.ugr.es/cod/1539901.cif
http://qiserver.ugr.es/cod/1540121.cif
http://qiserver.ugr.es/cod/1540262.cif
http://qiserver.ugr.es/cod/1540880.cif
http://qiserver.ugr.es/cod/1540881.cif
http://qiserver.ugr.es/cod/2002443.cif