Paulo Fernando Silva Filho and  Elcio Hideiti Shiguemori,  Automatic Landmark Selection Based on Feature Clustering for Visual Autonomous Unmanned Aerial Vehicle Navigation.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2018, vol. 137(5). 540 - 543
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/10008999.