1. Natural contamination test of insulators with DC voltage energization at Inland areas;Takasu;IEEE Transactions on Power Delivery,1988
2. Performance of HV transmission line insulator on desert conditions. Part 3: pollution measurement at a coastal site in the eastern region of Saudi Arabia;Akbar;IEEE Transactions on Power Delivery,1991
3. Flashover of non-uniformly polluted insulators;Streubel,1980
4. H. Streubel, Important requirement on insulators under polluted conditions, Journal of technical informations, Hermsdorf, n°20, 881–892, Germany, 1970.
5. Artificial pollution testing of HVDC insulators: Analysis of factors influencing performance, Electra n°140;Task Force 04.04 of Study Committee 33,1992