1. P.D. Goodell, W.J. Rebello, M.R. Ally, Final Report DOE/ID/12520 for Contract No. DE-AC07-84ID12520 with U.S. DOE, 1986.
2. E. Bershadsky, Y. Josephy, M. Ron, Metal–Hydrogen Systems Fundamentals and Applications, vol. II, R. Oldenbourg Verlag, Munchen, Stuttgart, 1988, p. 1373
3. I.M. Thomas, in: L.C. Klein (Ed.) Sol-Gel Technology for Thin Films, Fibers, Preforms, Electronics, and Specialty Shapes, Noyes Publications, Park Ridge, New Jersey, USA, 1988, p. 2.