1. Moore, A. D., Electrostatics and its applications (New York, 1973).
2. Heyl, G., Kunststoffe60, 45 (1970).
3. Kramer, H. undD. Meβner, Kunststoffe58, 673 (1968).
4. Zimmer, E., Kunststoffe60, 465 (1970).
5. Static Electrification, Conf. Ser. No. 11 (The Institute of Physics, London 1971).