http://qiserver.ugr.es/cod/1511701.cif
http://qiserver.ugr.es/cod/1525225.cif
http://qiserver.ugr.es/cod/1527763.cif
http://qiserver.ugr.es/cod/1528461.cif
http://qiserver.ugr.es/cod/1528462.cif
http://qiserver.ugr.es/cod/1528463.cif
http://qiserver.ugr.es/cod/1528464.cif