1. Dekker, A.J., Solid State Physics, Macmillan, London, 1958, Chapter 6.
2. Op. cit., Chapter 10.
3. Morin, F.J. and Maita, J.P., ‘Electrical Properties of Silicon Containing Arsenic and Boron’, Phys. Rev., 1954, 96, 28.
4. —, ‘Conductivity and Hall Effect in the Intrinsic Range of Germanium’, Phys. Rev., 1954, 94, 1525.
5. Dekker, A.J., op. cit., Chapter 13.