1. R.M. Schaffert, Electrophotography, enlarged and revised 1975 ed., The Focal Press, London and New York, 1975, p. 989.
2. Physics of electrophotography
3. L.B. Schein, Electrophotography and development physics, in: D.H. Auston, et al. (Eds.), Springer Series in Electrophysics, vol. 14, Springer, Berlin, Heidelberg, New york, London, Paris, Tokyo, 1987, p. 271.
4. P.M. Borsenberger, D.S. Weiss, Organic photoreceptors for xerography, in: B.J. Thompson (Ed.), Optical Engineering, vol. 59, Marcel Dekker Inc., New York, Basel, Hong Kong, 1998, p. 768.
5. R.H. Bube, Photoelectronic Properties of Semiconductors, Cambridge University Press, Cambridge, 1992.