F.W.E. Knoop, H.H. Brongersma, A.J.H. Boerboom and L.J. Oosterhoff: A new method of studying molecules by electron impact spectroscopyIn: International Mass Spectrometry Conference : Proceedings, The Institute of Petroleum, 1970. - pp. 136-140
J.A. Cabral, H.J. Hopman, F.G. Insinger and W. Ott: Time resolved beam distribution functions in a beam-plasma experimentIn: Plasma Physics and controlled nuclear Fusion Research, Int. Atomic Energy Agency, 1969.
L. Vriens: Binary-encounter and classical collision theoriesIn: Case Studies in Atomic Collision Physics I /ed. E.W. McDaniel and M.R.C. McDowell, North-Holland, 1969. - pp. 337-395
