?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Nguyen%2C+Thi+Thanh+Van&rft.aulast=Nguyen&rft.aufirst=Thi+Thanh+Van&rft.date=December+2013&rft.title=Development+of+a+Behavior-based+Navigation+System+for+Mobile+Robot+in+Unknown+Environment&rft.genre=proceeding