WASET
    Seung-Hun Kim and  Changwoo Park,  Localization for Indoor Service Robot Using Natural Landmark on the Ceiling.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 1248 - 1251
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/16730.