http://qiserver.ugr.es/cod/2020537.cif
http://qiserver.ugr.es/cod/2022636.cif
http://qiserver.ugr.es/cod/2022637.cif
http://qiserver.ugr.es/cod/2022638.cif
http://qiserver.ugr.es/cod/2022639.cif
http://qiserver.ugr.es/cod/2022640.cif
http://qiserver.ugr.es/cod/2022641.cif
http://qiserver.ugr.es/cod/2022658.cif
http://qiserver.ugr.es/cod/2022659.cif