?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Vuong%2C+Thi+Hai+Yen&rft.aulast=Vuong&rft.aufirst=Thi+Hai+Yen&rft.date=29+April+2016&rft.title=On+the+design+and+development+of+a+mobile+virtual+assistant+for+Vietnamese+(VAV)&rft.genre=proceeding