http://qiserver.ugr.es/cod/7213049.cif
http://qiserver.ugr.es/cod/7213065.cif
http://qiserver.ugr.es/cod/7217109.cif
http://qiserver.ugr.es/cod/7217110.cif
http://qiserver.ugr.es/cod/7217111.cif
http://qiserver.ugr.es/cod/7217112.cif
http://qiserver.ugr.es/cod/7217113.cif
http://qiserver.ugr.es/cod/7221305.cif