1. Adachi, G., K. Niki, H. Nagai and J. Schiokawa, 1982, J. Less Common Met. 88, 213.
2. Bakker, H.L M., G.J. de Bruin-Hordijk, 1982, Hydrogen Absorption and Critical Point Lowering, p. 659.
3. Bucur, R.V. and T.B. Franagan, 1974, J. Phys. Chem. N.F., 88, 225.
4. Eatons, E.E., C.E. Olson, N. Scheinberg and W.A. Iteyert, 1981, Int. J. Hydrogen Energy 6, 609.
5. Frazier, G.A. and R. Classer, 1979, J. Phys. D. 12, L113.