http://qiserver.ugr.es/cod/9011648.cif
http://qiserver.ugr.es/cod/9011649.cif
http://qiserver.ugr.es/cod/9011650.cif
http://qiserver.ugr.es/cod/9011651.cif
http://qiserver.ugr.es/cod/9011652.cif
http://qiserver.ugr.es/cod/9011653.cif
http://qiserver.ugr.es/cod/9011654.cif