http://qiserver.ugr.es/cod/2108531.cif
http://qiserver.ugr.es/cod/2108532.cif
http://qiserver.ugr.es/cod/2108533.cif
http://qiserver.ugr.es/cod/2108534.cif
http://qiserver.ugr.es/cod/2108535.cif
http://qiserver.ugr.es/cod/2108536.cif
http://qiserver.ugr.es/cod/2108537.cif
http://qiserver.ugr.es/cod/2108538.cif