1. Persson, S. L. "Method for determination of velocity distribution in a thin film/' AIAA J. 2, 372-373 (1964).
2. Jeffrey, R. C. "Particle motion in Poiseuille flow," Ph.D. Thesis,Univ. of Cambridge, (1964).
3. 3Nedderman, R. M. "Velocity profiles in thin liquid layers," Ph.D. Thesis,Univ. of Cambridge (1960); available in microfilm from Micro Methods Ltd., East Ardsley, Wakefield, Yorks, England.
4. The use of stereoscopic photography for the measurement of velocities in liquids
5. The measurement of velocities in thin films of liquid