?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Tran+Cao%2C+Quyen&rft.aulast=Tran+Cao&rft.aufirst=Quyen&rft.volume=49&rft.date=December+2018&rft.issn=1859-3585&rft.atitle=Underwater+Sound+Propagation+in+Tonkin+Gulf+using+Parabolic+Approximation&rft.title=Journal+of+Science+and+Technology&rft.genre=article