1. Hu, J., Niu, H., Carrasco, J., Lennox, B., & Arvin, F. (2022). Fault-tolerant cooperative navigation of networked UAV swarms for forest fire monitoring. Aerospace Science and Technology, 123, 107494. https://doi.org/10.1016/j.ast.2022.107494.
2. Global Drone Service Market Report 2019: Market is Expected to Grow from USD 4.4 Billion in 2018 to USD 63.6 Billion by 2025, at a CAGR of 55.9%. https://markets.businessinsider.com/news/stocks/global-drone-service-market-report-2019-market-is-expected-to-grow-from-usd-4-4-billion-in-2018-to-usd-63-6-billion-by-2025-at-a-cagr-of-55-9-1028147695
3. Intelligence, I.: Drone market outlook in 2022: Industry growth trends, market stats and forecast. https://www.insiderintelligence.com/insights/drone-industry-analysis-market-trends-growth-forecasts/
4. Classification of the Unmanned Aerial Systems | GEOG 892: Unmanned Aerial Systems. https://www.e-education.psu.edu/geog892/node/5
5. Federation of American Scientists: Intelligence Resource Program. https://irp.fas.org/