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M.J. van der Wiel and F.J. de Heer: Multiple ionization of Ar by 10 KeV electrons as a function of the energy lossIn: International Mass Spectrometry Conference : Proceedings, The Institute of Petroleum, 1970. - pp. 172-173
G.J. Brakenhoff and J.M. Houtkooper: Excitation of Langmuir oscillations in an ion beam-plasma systemIn: Fourth European Conference on Controlled Fusion and Plasma Physics, Rome, Italy, August 31-September 4, 1970, [s.n.], 1970.
L. Francken and D. Onderdelinden: Influence of planar channelling on single crystal sputteringIn: Atomic Collision Phenomena in Solids : Proceedings of an International Conference held at the University of Sussex, Brighton, England, from 7th to 12th Sept., 1969 /ed. D.W. Palmer, M.W. Thompson and P.D. Townsend, North-Holland, 1970. - pp. 266-277
F.J. de Heer: Excitation in collisions between ions and atoms observed by light intensity measurementsIn: International Mass Spectrometry Conference : Proceedings, The Institute of Petroleum, 1970. - pp. 143-152
A.J.H. Boerboom: Ion opticsIn: Recent Developments in Mass Spectroscopy : Proceedings of the International Conference on Mass Specroscopy, Kyoto /ed. K. Ogata and T. Hayakawa, University of Tokyo Press, 1970. - pp. 83-87
W.F. van der Weg, J.A. den Boer, F.W. Saris and D. Onderdelinden: Gallium implantations in silicon, studied by proton backscattering, X-ray emission and Hall effectIn: European Conference on ion implantation : Reading september 7th-9th 1970, Peter Peregrinus Limited, 1970. - pp. 198-202
H.J. Hopman, T. Matitti and J.H.A. van Wakeren: Cyclotron harmonic instabilities in a beam-plasma experimentIn: Contributions to the Third European Conference on Controlled Fusion and Plasma Physics and the Symposium on Beam-Plasma Interactions, Utrecht, The Netherlands, 23-27 June 1969, Wolters-Noordhoff, 1969.