http://qiserver.ugr.es/cod/1527743.cif
http://qiserver.ugr.es/cod/1528018.cif
http://qiserver.ugr.es/cod/2106060.cif
http://qiserver.ugr.es/cod/2106061.cif
http://qiserver.ugr.es/cod/2106063.cif
http://qiserver.ugr.es/cod/4030864.cif