Kriangkrai Maneerat and  Chutima Prommak,  An Enhanced Floor Estimation Algorithm for Indoor Wireless Localization Systems Using Confidence Interval Approach.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2014, vol. 91(7). 1182 - 1186
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/9998844.