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Marungsri, B. , Onchantuek, W. , Oonsivilai, A. , Kulworawanichpong, T.. "Analysis of Electric Field and Potential Distributions along Surface of Silicone Rubber Insulators under Various Contamination Conditions Using Finite Element Method". World Academy of Science, Engineering and Technology, Open Science Index 29, International Journal of Electrical and Computer Engineering (2009), 3(5), 1237 - 1247.