?url_ver=Z39.88-2004&rft_id=10.1109%2FITSIM.2010.5561644&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=S.&rft.au=Ahmad%2C+S.&rft.aulast=Ahmad&rft.isbn=9781424467181&rft.title=An+improved+security+framework+for+data+warehouse%3A+A+hybrid+approach&rft.date=2010&rft.genre=proceeding