1. Pryor, B. M. “Tracking of In-service GIS Barrier Insulators”. IERE Workshop on GIS, Toronto. (1990)
2. Fujimoto, N. “Conduction Currents in Gas-Insulated Switchgear for Low Level DC Stress”. Fifth International Symposium on Gaseous Dielectrics. (1987)
3. Cook, C. M. “Charging of Insulator Surfaces by Ionisation and Transport in Gases”. IEEE Trans. Electric Insulation. Vol. EI-17, No. 2 pp172–178 (1982)
4. Nakanishi, K. “High Voltage DC Gas Insulation”. Gaseous Dielectrics VI. Edited by L. G. Christophorou and I. Sauers. Plenum Press. (1990)
5. Cook, C. M., Nakata, R., Ouyang, M., Dale, S. J. and Garrity, T. F. “Compressed Gas Insulation for Advanced HVDC Transmission Equipment”. CIGRE 1982 Session, Paper 15-14. (1982)