http://qiserver.ugr.es/cod/1509280.cif
http://qiserver.ugr.es/cod/1509420.cif
http://qiserver.ugr.es/cod/1537317.cif
http://qiserver.ugr.es/cod/1537318.cif
http://qiserver.ugr.es/cod/1537319.cif
http://qiserver.ugr.es/cod/1537556.cif
http://qiserver.ugr.es/cod/1538322.cif
http://qiserver.ugr.es/cod/2002282.cif