W. -, N. I. Sinisuka, S. -, and M. A. Djauhari, “COMPARATIVE STUDY OF LEAKAGE CURRENT PROPERTIES ON THE NEW-CLEAN PORCELAIN AND EPOXY RESIN OUTDOOR INSULATORS DUE TO VARIOUS PARAMETERS”, TECHNOSCIENTIA, vol. 2, no. 2, pp. 266–279, Feb. 2010.