Flax, Alexander H. (July 29, 1991). "Oral History interview transcript with Alexander Flax" (Interview). Interviewed by Finn Aserud. American Institute of Physics, Niels Bohr Library and Archives. Retrieved April 25, 2020.
National Academy of Engineering 1993, pp. 1–2. National Academy of Engineering, ed. (1993). "Alexander H. Flax Highlights of an Engineering Career". The Future of Aerospace – Proceedings of a Symposium Held in Honor of Alexander H. Flax Home Secretary. Washington, D.C.: The National Academies Press. doi:10.17226/2101. ISBN0-309-04881-8.
National Academy of Engineering 1993, pp. 2–3. National Academy of Engineering, ed. (1993). "Alexander H. Flax Highlights of an Engineering Career". The Future of Aerospace – Proceedings of a Symposium Held in Honor of Alexander H. Flax Home Secretary. Washington, D.C.: The National Academies Press. doi:10.17226/2101. ISBN0-309-04881-8.
National Academy of Engineering 1993, p. 4. National Academy of Engineering, ed. (1993). "Alexander H. Flax Highlights of an Engineering Career". The Future of Aerospace – Proceedings of a Symposium Held in Honor of Alexander H. Flax Home Secretary. Washington, D.C.: The National Academies Press. doi:10.17226/2101. ISBN0-309-04881-8.