1. G.I. Taylor: Proc. R. Soc. (London) A280, 383 (1964)
2. N. Sujatha, P.H. Cutler, E. Kazes, N.M. Miskovsky: In Proc. 30th Int'l. Field Emission Symp., Philadelphia (1983) p. 58
3. S.P. Thompson, P.D. Prewett: J. Phys. D17, 2305 (1984)
4. D.R. Kingham, L.W. Swanson: Appl. Phys. A34, 123 (1984)
5. H. Gaubi, P. Sudraud, M. Tence, J. Van de Walle: In Proc. 29th Int'l. Field Emission Symp. G�teborg (1982) p. 357