Roberto Sabatini and  Celia Bartel and  Anish Kaharkar and  Tesheen Shaid and  Subramanian Ramasamy,  Navigation and Guidance System Architectures for Small Unmanned Aircraft Applications.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2014, vol. 88(4). 758 - 777
    [viewed 12 December 2019]. Available from: https://publications.waset.org/pdf/9998114.