Samuelsen, Dag A. H., and Olaf H. Graven. “Dual Control System for Virtual Protection of a Remote UAV Experiment”. International Journal of Online and Biomedical Engineering (iJOE) 8, no. S4 (December 5, 2012): pp. 60–64. Accessed June 30, 2024. https://online-journals.org/index.php/i-joe/article/view/2280.