?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Trinh%2C+Vu+Tuan+Anh&rft.aulast=Trinh&rft.aufirst=Vu+Tuan+Anh&rft.date=8+August+2018&rft.title=Indoor+Positioning+using+BLE+iBeacon%2C+smartphone+Sensors+and+Distance-based+Position+Correction+Algorithm&rft.genre=proceeding