http://qiserver.ugr.es/cod/1537982.cif
http://qiserver.ugr.es/cod/1537983.cif
http://qiserver.ugr.es/cod/1538654.cif
http://qiserver.ugr.es/cod/1538656.cif
http://qiserver.ugr.es/cod/1539514.cif
http://qiserver.ugr.es/cod/1540815.cif