1. Clark D. Characterizing cyberspace: past, present and future; 2010 [cited 2022 Sep 6]. Available from: https://ecir.mit.edu/sites/default/files/documents/%5BClark%5D%20Characterizing%20Cyberspace-%20Past%2C%20Present%20and%20Future.pdf.
2. Pathan AS-K, Sabuj SR, Hossain MA. Issues and challenges in futuristic aerial-ground networks. [cited 2022 Sep 6]. Available from: https://www.techscience.com/CMES/special_detail/aerial-ground_networks.
3. The Internet of Space Things/CubeSats: A ubiquitous cyber-physical system for the connected world
4. Cybersecurity Fundamentals