Ubiquitous Positioning: Integrated GPS/Wireless LAN Positioning for Wheelchair Navigation System. - Wan Mohd. Yaakob Wan Bejuri; Wan Mohd Nasri Wan Muhamad Saidin; Mohd Murtadha Bin Mohamad; Maimunah Sapri; Kah Seng Lim (ACIIDS (1), 2013)