http://qiserver.ugr.es/cod/1521307.cif
http://qiserver.ugr.es/cod/1535940.cif
http://qiserver.ugr.es/cod/1541576.cif
http://qiserver.ugr.es/cod/1541577.cif
http://qiserver.ugr.es/cod/1541977.cif
http://qiserver.ugr.es/cod/1541979.cif
http://qiserver.ugr.es/cod/1541981.cif
http://qiserver.ugr.es/cod/1541983.cif
http://qiserver.ugr.es/cod/1542212.cif