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4. K. D. Sinelnikov, V. E. Ivanov, V. M. Amonenko, and V. D. Burlakov: Refining Beryllium and Other Metals by Condensation on Heated Surfaces, A/CONF. 15/P/2051, USSR, July 1958, Second United Nations International Conference on the Peaceful Uses of Atomic Energy.
5. A. C. Secrest, E. L. Foster, and R. F. Dickerson: Preparation and Properties of Uranium Monocarbide, BMI 1309, 1959, Battelle Memorial Institute, Columbus, Ohio.