ASWATHBABU.O.G, GOPINATH.P, RAJKUMAR.S and S.KAVITHA (2018) “Velocity based Tracking and Localization System using Smartphones with GPS and GPRS/3G ”, International journal of intellectual advancements and research in engineering computations, 6(2), pp. 1853–1857. doi: 10.61096/ijiarec.v6.iss2.2018.1853-1857.