?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Ahmad+Hashem%2C+&rft.aulast=Ahmad+Hashem&rft.date=5+September+2006&rft.title=Plagiarism+Detection+Systems+%3A+An+Evaluation+Of+Several+Systems&rft.genre=proceeding