http://qiserver.ugr.es/cod/8104234.cif
http://qiserver.ugr.es/cod/9008310.cif
http://qiserver.ugr.es/cod/9008311.cif
http://qiserver.ugr.es/cod/9008312.cif
http://qiserver.ugr.es/cod/9008313.cif
http://qiserver.ugr.es/cod/9011447.cif
http://qiserver.ugr.es/cod/9016300.cif