1. State of the Art Report On behalf of CIGRE Study Committees 15 and 33 presented by CIGRE WG 33/15.08: Dielectric diagnosis of electrical equipment for AC applications and its effects on insulation coordination. TB 059. 1990
2. F. Schmuck, J. Seifert, I. Gutman, A. Pigini: Assessment of the condition of overhead line composite insulators. CIGRE Session 2012, Paris, Paper D2–214
3. R. S. Gorur, T. Orbeck: Surface Dielectric Behavior of Polymeric Insulation under HV Outdoor Conditions. IEEE Transactions on Electrical Insulation Vol. 26 No. 5, October 1991
4. CIGRE WG B2.21: Guide For The Assessment Of Composite Insulators In The Laboratory After Their Removal From Service. Technical Brochure 481, 2011
5. CIGRE WG B2.03: Guide for the Assessment of old Cap & Pin and Long-rod Transmission Line Insulators made of Porcelain or Glass: What to do and when to replace. TB 306, 2006