Kharchenko, Volodymyr, and Nataliia Kuzmenko. “UNMANNED AERIAL VEHICLE COLLISION AVOIDANCE USING DIGITAL ELEVATION MODEL”. Proceedings of National Aviation University 54, no. 1 (April 4, 2013): 21–25. Accessed November 22, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/3858.