http://qiserver.ugr.es/cod/1537739.cif
http://qiserver.ugr.es/cod/1537741.cif
http://qiserver.ugr.es/cod/1537742.cif
http://qiserver.ugr.es/cod/1537743.cif
http://qiserver.ugr.es/cod/1537745.cif
http://qiserver.ugr.es/cod/1537748.cif
http://qiserver.ugr.es/cod/1537750.cif
http://qiserver.ugr.es/cod/1537752.cif