1. Pontryagin, L. S., Boltyanskii, V. G., Gamkrelidze, R. V., andMishchenko, E. F.,The Mathematical Theory of Optimal Processes, John Wiley and Sons (Interscience Publishers), New York, 1965.
2. Meghreblian, R. V., andHolmes, D. K.,Reactor Analysis, McGraw-Hill Book Company, New York, 1960.
3. Kochurov, B. P.,Minimum Critical Mass for Limited Uranium Concentration, Soviet Journal of Atomic Energy, Vol. 20, No. 3, 1966.
4. Feinberg, S. M.,Progress in Research Reactors, Paper presented at the Conference on Physics and Engineering of Research Reactors, Budapest, Hungary, 1965.
5. Boltyanskii, V. G.,The Mathematical Methods of Optimal Control (in Russian), Nauka Press, Moscow, 1966.