1. Hyp. Int.;M Carbucicchio,1989
2. Hyp. Int.;M Carbucicchio,1989
3. Hyp. Int.;HG Devare,1987
4. Hyp. Int.;HG Devare,1987
5. Soares, J.C., Melo, A.A., da Silva, M.F., Freitag, K., Herrmann, C., Herzog, P., Rudolph, H.J., Schloesser, K., Vianden, R., Wrede, U. and Boerma, D.O. (1984) ‘Oxygen gettering by hafnium implanted in beryllium: A<0001> Hf-0 dumbbell?’, App. Phys. Lett. 45, 143–145.