http://qiserver.ugr.es/cod/1539419.cif
http://qiserver.ugr.es/cod/1539423.cif
http://qiserver.ugr.es/cod/1539809.cif
http://qiserver.ugr.es/cod/1539812.cif
http://qiserver.ugr.es/cod/1541101.cif
http://qiserver.ugr.es/cod/1541292.cif
http://qiserver.ugr.es/cod/1541293.cif