Grasaesom, J. , Thong-om, S. , Payakcho, W. , Oonsivilai, A. , Marungsri, B.. "Comparison of Ageing Deterioration of Silicone Rubber Outdoor Polymer Insulator under Salt Water Dip Wheel Test". World Academy of Science, Engineering and Technology, Open Science Index 60, International Journal of Electrical and Computer Engineering, (2011), 5(12), 1896 - 1903.