http://qiserver.ugr.es/cod/1518309.cif
http://qiserver.ugr.es/cod/1518534.cif
http://qiserver.ugr.es/cod/1518535.cif
http://qiserver.ugr.es/cod/1519450.cif
http://qiserver.ugr.es/cod/1519451.cif
http://qiserver.ugr.es/cod/1520752.cif
http://qiserver.ugr.es/cod/1529304.cif
http://qiserver.ugr.es/cod/1529305.cif