http://qiserver.ugr.es/cod/1535598.cif
http://qiserver.ugr.es/cod/2002521.cif
http://qiserver.ugr.es/cod/2002522.cif
http://qiserver.ugr.es/cod/2002562.cif
http://qiserver.ugr.es/cod/2002563.cif
http://qiserver.ugr.es/cod/2002564.cif
http://qiserver.ugr.es/cod/2002565.cif
http://qiserver.ugr.es/cod/2002566.cif
http://qiserver.ugr.es/cod/2002567.cif