http://qiserver.ugr.es/cod/1521515.cif
http://qiserver.ugr.es/cod/1531271.cif
http://qiserver.ugr.es/cod/1531736.cif
http://qiserver.ugr.es/cod/1531739.cif
http://qiserver.ugr.es/cod/9009920.cif
http://qiserver.ugr.es/cod/9009921.cif
http://qiserver.ugr.es/cod/9009922.cif
http://qiserver.ugr.es/cod/9009923.cif
http://qiserver.ugr.es/cod/9009924.cif
http://qiserver.ugr.es/cod/9009925.cif