http://qiserver.ugr.es/cod/1531861.cif
http://qiserver.ugr.es/cod/1531864.cif
http://qiserver.ugr.es/cod/1531867.cif
http://qiserver.ugr.es/cod/1531870.cif
http://qiserver.ugr.es/cod/1531873.cif
http://qiserver.ugr.es/cod/1531876.cif
http://qiserver.ugr.es/cod/1531878.cif
http://qiserver.ugr.es/cod/1531881.cif