Trendy zmian w środowisku bezpieczeństwa: Orletsky, David T., Yuna Huh Wong, Brien Alkire, Steven Berner, David R. Frelinger, Forrest E. Morgan, Karl P. Mueller, Marek N. Posard, Richard Silberglitt, and William Young, Evaluating Future Trends in Support of the Air Force Strategic Environment Assessment: Discussion and Results from a Structured Workshop. Santa Monica, CA: RAND Corporation, 2019.