1. Measurements of particle size and its charge;Yokoyama,1987
2. Triboelectrification and toner surface-charge density in the two-component development system of electrophotography;Takahashi,1990
3. Elektrische Durchbruchfeldstarke von Gasen;Schumann,1923
4. Elektrische Durchbruchfeldstarke von Gasen;Schumann,1923