?url_ver=Z39.88-2004&rft_id=10.1109%2FICCISci.2012.6297262&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Abbas&rft.au=Abbas%2C+M.A.&rft.aufirst=M.A.&rft.title=Resource+Description+Framework+based+intelligent+tutoring+system&rft.isbn=9781467319386&rft.date=2012&rft.genre=proceeding