http://qiserver.ugr.es/cod/8103519.cif
http://qiserver.ugr.es/cod/8103526.cif
http://qiserver.ugr.es/cod/8103550.cif
http://qiserver.ugr.es/cod/8103562.cif
http://qiserver.ugr.es/cod/8103591.cif
http://qiserver.ugr.es/cod/8103600.cif
http://qiserver.ugr.es/cod/8103889.cif