1. Rays of Positive Electricity and their Application to Chemical Analysis, Longmans, Green and Co., Ltd., London, (1913).
2. YUMASS4, Fourth Summer School and Symposium on Mass Spectrometry, Donji Milanovac, Yugoslavia, p. 72 (1990).
3. and Proceedings of the Second International Swarm Seminar, Oak Ridge, TN, ed. by Pergamon Press, New York (1981)
4. NATO ASI Seri;Haberland,1987