1. N. Lions, et al. Special Instrumentation of Phenix. pp 525–535 of Fast Reactor Power Stations, Thomas Telford Ltd. London, (1974).
2. N.C. Hoitink, et al. Under Sodium Viewing Development for FFTF. Second International Conference on Liquid Metal Technology in Energy Production, pp 4–37 to 4–43 USDOE, CONF-800401-P1 (April 1980).
3. J. Taguchi et al. An ultrasonic Viewing System in Liquid Sodium. IEEE transactions on Nuclear Science. Vol NS27, No 1. (February 1980).
4. J.A. McKnight, J. Bishop, D.K. Cartwright, and W.R. Diggle. The Application of Ultrasonic Technology Under Sodium. Second International Conference on Liquid Metal Technology in Energy Production, Hanford, USA, 20–23 April 1980.
5. J. Bishop, British Patents 1,525,950, 2029,306.