J. Schutten, A. J. H. Boerboom, T. van der Hauw and F. L. Monterie, Precise measurement of isotope ratios with a single collector mass spectrometer, Appl. Sci. Res. B 6, 388-392 (1956)
F. J. de Heer, W. Huizinga and J. Kistemaker, Charge exchange and ionization cross-section determination for positive ions and atoms in the energy region 2.5 to 25 KeV, Appl. Sci. Res. B 5, 337-339 (1955)
A. E. de Vries, H. Jansz, J. Kistemaker, H. C. Hamers, J. Blok and C. C. Jonker, Detection of thermal neutrons by borazole filled proportional counters, Physica 20, 1138-1140 (1954)