M.J. van der Wiel and C.E. Brion, "Photoelectron" spectroscopy by electron inpact coincidence measurements of scattered and ejected electrons in CO, J. Electron Spectrosc. Relat. Phenom. 1, (1972)
T.M. El-Sherbini and M.J. van der Wiel, Oscillator strengths for multiple ionization in the outer and first inner shells of Kr and Xe, Physica 62, 119-138 (1972)
P.G. Kistemaker, M.M. Hanna, A. Tom and A.E. de Vries, Rotational relaxation in mixture of methane with helium, argon and xenon, Physica 60, 459-471 (1972)