1. J. G. Walker and E. Jakeman, SPIE 492 (EC00SA84) 274–277 (1985).
2. J. H. Shapiro, M. C. Teich and B. E. A. Saleh, Phys. Rev. Letts. 56: 1136–39 (1986).
3. J. G. Rarity and P. R. Tapster in “Photons and Quantum Fluctuations” E. R. Pike and H. Walther, eds., Adam Hilger, Bristol and Philadelphia, 122–150, (1988).
4. P. R. Tapster, J. G. Rarity and J. S. Satchell, Europhys. Lett., 4: 293–299 (1987).
5. R. G. W. Brown in “Third International Symposium on Laser Anemometry-FED-Vol 55” F. Ali and G. Morrison, eds.The American Society of Mechanical Engineers, New York, 45–49 (1989).