1. R.V. Latham:High Voltage Vacuum Insulation: the Physical Basis (Academic, London 1981); IEEE Trans. EI-18, 194 (1983)
2. J. Halbritter: IEEE Trans. EI-18, 253 (1983)
3. W.S. Boyle, P. Kislink, L.H. Germer: J. Appl. Phys.26, 720 (1955)
4. K. Tsuruta: IEEE Trans. EI-18, 204 (1983)
5. J. Halbritter: IEEE Trans. EI-20, 671 (1985)