1. Tunneling in Solids, Suppl. 10 of Solid State Physics;Duke,1969
2. E. Burstein S. Lundqvist), Plenum, New York, 1969
3. Inelastic Electron Tunneling Spectroscopy (T. Wolfram), Springer-Verlag, New York, 1978
4. Principles of Electron Tunneling Spectroscopy;Wolf,1989
5. C.B. Duke op. cit. p. vii