1. G. G. Libowitz, Solid State Chemistry of Binary Hydrides, Benjamin, N. Y. (1965).
2. Metal Hydrides [Russian translation], (ed. by W. Noller, D. Blackledge, and G. Libowitz) Atomizdat, Moscow (1973).
3. H. J. Goldshmidt, Interstitial Alloys, Plenum, New York (1968).
4. A. C. Switendick, Solid State Commun.,8, 1463 (1970).
5. A. C. Switendick, Int. J. Quant. Chem.,5, 459 (1971).