Ronald M. Yannone,  Deterministic Method to Assess Kalman Filter Passive Ranging Solution Reliability.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2008, vol. 19(7). 1467 - 1472
    [viewed 18 April 2021]. Available from: https://publications.waset.org/pdf/14424.