1. H.G. Wells: The War of the Worlds ( Bantam Doubleday Dell, New York 1988 )
2. T.H. Maimon: Nature 187, 493 (1960)
3. F. Breech, L. Cross: Appl. Spectrosc. 16, 59 (1962)
4. I. Harding-Barlow, K.G. Snetsinger, K. Keil: Laser Microprobe Instrumentation, in Microprobe Analysis, ed. by C.A. Andersen ( Wiley, New York 1973 )
5. C.A. Andersen: Microprobe Analysis ( Wiley, New York 1973 )