http://qiserver.ugr.es/cod/1539427.cif
http://qiserver.ugr.es/cod/1539431.cif
http://qiserver.ugr.es/cod/1539435.cif
http://qiserver.ugr.es/cod/1539438.cif
http://qiserver.ugr.es/cod/1539441.cif
http://qiserver.ugr.es/cod/1539443.cif
http://qiserver.ugr.es/cod/1539445.cif