1. Studien über electrische Grenzschichten
2. Electrostatics in the Petroleum Industry;Klinberg,1958
3. 2nd Int. Conf. on Electrical Safety in Hazardous Environments;Strawson,1975
4. Electrostatic Hazards in Liquids and Powders;Bright;Journal of Electrostatics,1977
5. Proc. 3rd Int. Cong. on Static Electricity;Haig,1977