?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Tran%2C+Thanh+Luong&rft.aulast=Tran&rft.aufirst=Thanh+Luong&rft.date=17+August+2012&rft.title=Concept+Learning+for+Description+Logic-based+Information+Systems&rft.genre=proceeding