http://qiserver.ugr.es/cod/4004091.cif
http://qiserver.ugr.es/cod/4004092.cif
http://qiserver.ugr.es/cod/4004093.cif
http://qiserver.ugr.es/cod/4004094.cif
http://qiserver.ugr.es/cod/4004095.cif
http://qiserver.ugr.es/cod/4004096.cif
http://qiserver.ugr.es/cod/4004097.cif
http://qiserver.ugr.es/cod/4004098.cif