1. Aerospace. (2023). Nasa Budget (GSMH %). Aerospace.com. https://aerospace.csis.org/
2. ASP. (2022). Center for Strategic and International Studies-Aerospace Security Project. https://www.csis.org/programs/international-security-program/aerospace-security-project
3. Bebeitova, M. (2020). Space Economy and the Concept of Space Mining. M.A. Thesis, Kocaeli University Institute of Social Sciences, Kocaeli, Turkey.
4. Betts, R. K. (1987). Nuclear Blackmail And Nuclear Balance, (1. Edition). The Brookings Instition, Washington.
5. Brukardt, R. (2022). How Will The Space Economy Change The World? McKinsey Quarterly.