1. C.J. Everett, S.M. Ulam, Los Alamos Report LAMS-1955 (1955), Declassified, 25 August, 1976.
2. F. Winterberg, in: Proceedings of International School of Physics, Enrico Fermi, Physics of High Energy Density, 14–26 July, 1969, Academic Press, New York, 1971, p. 402ff.
3. A.R. Martin, A. Bond, Project Daedalus—Final Report, The propulsion system, Journal of the British Interplanetary Society, Supplement, 1978.