1. B. E. Bayer and J. F. Hamilton, Computer investigation of a latent image model, Journal of the Optical society of America, 55(4) (1965), 439–4527.
2. Part 2, IMA Volumes in Mathematics and its Applications;A Friedman,1989
3. Part 9, IMA Volumes in Mathematics and its Applications;A Friedman,1997
4. R. W. Gurney and N. F. Mott, Electronic processes in Ionic crystals, Oxford University Press, oxford (1938).
5. D. H. Sattinger and H. F. Weinberger, A stochastic model of latent image formation, in “Ordinary and Partial Differential Equation”, Vol. III, eds. B.D. Slee-man and R. J. Jarvis, Pittman Research Notes in Math. Services, 254, Longman Sci. & Tech., Harlow (1991), 168–182.