1. H. D. Beckey, Principles of Field Ionization and Field Desorption Mass Spectrometry, Pergamon Press, Oxford (1977)
2. H. D. Beckey, K. Levsen, F. W. Rollgen and H. R. Schulten, Surf. Science, 70, 325 (1978)
3. A. Benninghoven, D. Jaspers and W. Sichtermann, Appi. Phys., 11, 35 (1976)
4. R. D. Macfarlane and D. F. Togerson, Science, 191, 920 (1976)
5. M. M. Sheil and P. J. Derrick, Org. Mass Spectrom., 27, 1000 (1992)