http://qiserver.ugr.es/cod/1539662.cif
http://qiserver.ugr.es/cod/1540200.cif
http://qiserver.ugr.es/cod/1540756.cif
http://qiserver.ugr.es/cod/1540954.cif
http://qiserver.ugr.es/cod/1541102.cif
http://qiserver.ugr.es/cod/1541110.cif
http://qiserver.ugr.es/cod/1541201.cif
http://qiserver.ugr.es/cod/1541202.cif