Kittipob Kondee and Chutima Prommak, Optimal Design of Reference Node Placement for Wireless Indoor Positioning Systems in Multi-Floor Building. journal = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2014, vol. 91(7). 1191 - 1195 [viewed 23 September 2024]. Available from: https://publications.waset.org/pdf/9998851.