?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Cao%2C+Thanh+Son&rft.aulast=Cao&rft.aufirst=Thanh+Son&rft.issue=1&rft.volume=1&rft.date=February+2014&rft.atitle=WORL%3A+a+Nonmonotonic+Rule+Language+for+the+Semantic+Web&rft.title=Vietnam+Journal+of+Computer+Science&rft.pages=57-69&rft.genre=article