References
- Klein, C. A., J. Appl. Phys., 39, 2029, 1968
- Dannert, H., Hirsch, H.-J., and Jung, M., Proc. Current Problems in Electrophotography, 3. Eur. Coll., Zürich 1971
- Kwestroo, W., and Huizing, A., J. inorg. nucl. Chem. 27, 1951, 1965
- Timmer, F., (private communication)