http://qiserver.ugr.es/cod/1536916.cif
http://qiserver.ugr.es/cod/1536919.cif
http://qiserver.ugr.es/cod/1536921.cif
http://qiserver.ugr.es/cod/1536923.cif
http://qiserver.ugr.es/cod/1536926.cif