1. For a representative collection of papers, see e.g. M. Stutzmann and J. Chevalier (eds.), Hydrogen in Semiconductors, North Holland, 1991; Physica B, 170 (1991).
2. A. Schenck, J. Alloys Comp., 253–254 (1997) 406–413.
3. A. Schenck, Muon Spin Rotation Spectroscopy, Hilger, Bristol, 1985.
4. S.F.J. Cox, J. Phys. C, 20 (1987) 3187–3319.
5. B.D. Patterson, Rev. Mod. Phys., 60 (1988) 69–159.