http://qiserver.ugr.es/cod/1513997.cif
http://qiserver.ugr.es/cod/1513999.cif
http://qiserver.ugr.es/cod/1514001.cif
http://qiserver.ugr.es/cod/1520928.cif
http://qiserver.ugr.es/cod/1521869.cif