1. E. Schram and R. Lombaert, Radioisotopes in Scientific Research (Proceedings of the UNESCO International Conference, Paris, Sept. 1957), Vol. 1, Pergamon Press, London, p. 626
2. A simple helium–ethanol flow counter for monitoring chromatograph-column effluents containing weak β-emitting isotopes
3. J. Sternberg and H. Simmonnet, Radioisotope Techniques, (Proceedings of the Isotope Techniques Conference, Oxford, July 1951), Vol. 1, H.M. Stationery Office, London, p. 368.