1. Matsuoka, M., Discovery of ZnO varistors and their progress for the two decades. In Ceramic Transactions, Vol. 3, ed. L. M. Levinson. Am. Ceram. Soc., 1989, Inc., Westerville, OH, pp. 3–9.
2. Characterization of individual interfacial barriers in a ZnO varistor material;Olsson;J. Appl. Phys.,1989
3. Maeda, K., Miyoshi, T., Takeda, Y., Nakamura, K., Ogihara, S. and Ura, M., Grain boundary effect in highly resistive SiC ceramics with high thermal conductivity. In Advances in Ceramics, Vol. 7, ed. M. F. Yan and A. H. Heuer. Am. Ceram. Soc., Inc., Westerville, OH, 1984, pp. 260–268.
4. Direct determination of barrier voltage in ZnO varistors;van Kemenade;J. Appl. Phys.,1979
5. Tao, M., Ai, Bui, Dorlanne, O. and Loubiere, A., Different “single grain junctions” within a ZnO varistor. J. Appl. Phys., 1987, 61(4), 1562–1567.