1. TASS Report, “Pravda,” March 26, 1971.
2. G. M. Gryaznov and V. Ya. Pupko, “Topaz-1, Soviet space nuclear power system,”Priroda, No. 10, 29–36 (1991).
3. G. M. Gryaznov, A. I. El'tsov, V. A. Kuznetsov, et al., “Development and power tests of the “Topaz” thermionic reactor-converter,” in:Proceedings of the 4th International Conference on Peaceful Uses of Atomic Energy, Geneva (1971).
4. G. M. Gryaznov, E. E. Zhabotinskii, A. M. Nikonov, et al., “Application of thermionic nuclear power systems with a thermal-neutron reactor-converter for interorbital flights of space craft,”At. Énerg.,70, No. 4, 221–247 (1991).
5. G. M. Gryaznov, “Space nuclear power systems,” in:Proceedings of an Anniversary Conference of the Atomic Energy Ministry of the Russian Federation “Nuclear Science and Technology in Russia—50 Years,” Moscow (1996), pp. 174–183.