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4. CLASS, G., LOEFFEL, R. & REIMANN, J. “Mass Flow Measuring Techniques in Transient Two-Phase Flow”, Specialist Meeting on Transient Two-Phase Flow, OECD/ Nuclear Energy Agency, Toronto, Canada, August 1976
5. DAVIES, W.E.R. “Velocity Measurements in Bubbly Two-Phase Flows Using Laser-Doppler Anemometry”, Institute for Aerospace Studies, University of Toronto, Part I & II, UTIAS-Technical-Notes No. 184 & 185, 1973