1. K. A. Metcalfe: J. Sei. Instrum. 32, 74 (1955)
2. K. A. Metcalfe, R. J. Wright: J. Oil Colour Chem. Assoc. 39, 845
3. V. E. Straughan, E. F. Mayer: Proc. Nat. Electron. Conf. 13, 959
4. C. J. Claus, E. F. Mayer: In Xerography and Related Processes, ed. by J. Dessauer, H. Clark (Focal, New York 1965) Chap. 12
5. G. Jacobson, J. Hillkirk: Xerox, an American Samurai (Macmillan, New York 1986) p. 122