http://qiserver.ugr.es/cod/8104373.cif
http://qiserver.ugr.es/cod/8104377.cif
http://qiserver.ugr.es/cod/8104378.cif
http://qiserver.ugr.es/cod/8104429.cif
http://qiserver.ugr.es/cod/8104473.cif
http://qiserver.ugr.es/cod/8104528.cif
http://qiserver.ugr.es/cod/9011479.cif