G.A. Stevens and A.E. de Vries, The influence of the distribution of atomic masses within the molecule on thermal diffusion: II. Isotopic methane and methane/argon mixtures, Physica 39, 346-360 (1968)
H.J. Hopman, T. Matitti and J. Kistemaker, The electron cyclotron instability and high-frequency ionization in a beam-plasma experiment, Plasma Phys. 10, 1051-1067 (1968)
J.F.M. Aarts and F.J. de Heer, Extension of the branching-ratio method for intensity calibration between 1500 and 2600 Å, J. Opt. Soc. Am. 58, 1666-1667 (1968)
J.-B. Sanders and M.W. Thompson, The generation of focused collision sequences in irradiated crystals: a calculation based on the inverse square potential, Philos. Mag. 17, 211-214 (1968)
W.A. Oost, J.H. Los, A.N. van der Steege, A.J.H. Boerboom and A.E. de Vries, Measurement of relative diffusion coefficients and thermal diffusion factors of CO2 isotopes in Ar and He, Physica 36, 637-645 (1967)
