Altuntas, Serkan, and Soydan Aba. “Technology Forecasting of Unmanned Aerial Vehicle Technologies through Hierarchical S Curves”. Defence Science Journal 72, no. 1 (January 5, 2022): 18-29. Accessed March 28, 2024. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/16823.