Optical components for digital optical circuits. - Brian S. Wherrett; S. Desmond Smith; Frank A. P. Tooley; Andrew C. Walker (Future Gener. Comput. Syst., 1987)

Rangefinder using Time Correlated Single Photon Counting. - J. S. Massa; Manickam Umasuthan; Andrew M. Wallace; Gerald S. Buller; Andrew C. Walker (3DIM, 1997)

Development of Free-Space Digital Optics in Computing. - James Gourlay; Tsung-Yi Yang; Julian A. B. Dines; Andrew C. Walker (Computer, 1998)