H. Okubo, A. Beroual, "Recent Trend and Future Perspectives in Electrical Insulation Techniques in Relation to Sulfur Hexafluoride ($SF_6$) Substitutes for High Voltage Electric Power Equipment", IEEE Electr. Insul. Mag., Vol. 27, No. 2, pp. 34-42, 2011.
L. G. Christophorou, J. K. Olthoff and R. J. Van Brunt, "Sulfur Hexafluoride and the Electric Power Industry", IEEE Electr. Insul. Mag., Vol. 13, No. 5, pp. 20-24, 1997.
H. Okubo and N. Hayakawa, "Dielectric Characteristics and Electrical Insulation Design Techniques of Gases and Gas Mixtures as Alternatives to $SF_6$", Gaseous Dielectrics X, pp. 243-252, 2004.
T. Takuma, O. Yamamoto and S. Hamada, "GASES AS A DIELECTRIC", Gaseous Dielectrics X, pp. 195-204, 2004.
E. H. Choi, B. H. Koo, L. K. Kim and K. S. Lee, "Assess of Breakdown Characteristics about Environmentally Friendly Gases", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 23, No. 5, pp. 96-100, 2009.
M. Taki, D. Maekawa, H. Odaka, H. Mizoguchi and S. Yanabu, "Interruption Capability of $CF_3I$
Gas as a Substitution Candidate for $SF_6$
Gas", IEEE Trans. Dielectri. Electr. Insul., Vol. 14, No. 2, pp. 341-346, 2007.
T. Rokunohe, Y. Yagihashi, K. Aoyagi, T. Oomori, and F. Endo, "Development of $SF_6$
-free 72.5 kV GIS", IEEE Trans. Power Deliv., Vol. 22, No. 3, pp. 1869-1876, 2007.
J. H. Lee, H. Park, E. H. Choi, S. H. Jang and K. S. Lee, "Surface Discharge Characteristics of Teflon Resin in Environment-Friendly Insulation Gas", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 23, No. 10, pp. 121-127, 2009.
D. Y. Lim, "Comparative Study on Surface Insulation Performance in Oxygen/Nitrogen Gas Mixtures for High Voltage Equipment in Distribution Class", Ph. D. Thesis, Yeungnam University, 2015.
S. K. Kim, "A Study on Electrical Properties of Polymeric Insulating Materials for Eco-Friendly Power Cable", M. S. thesis, Hoseo University, 2013.
R. Sarathi, A. J. Reid and M. D. Judd, "Partial Discharge Study in Transformer Oil due to Particle Movement under DC Voltage using the UHF Technique", Electric Power Systems Research, Vol. 78, pp. 1819-1825, 2008.
M. D. Judd, O. Farish, and B. F. Hampton, "The Excitation of UHF Signals by Partial Discharges in GIS", IEEE Trans. Dielectr. Electr. Insul., Vol. 3, No. 2, pp. 213-228, 1996.
M. Hikita, S. Otsuka, T. Teshima, S. Okabe, and S. Kaneko, "Electromagnetic (EM) Wave Leakage at the Spacer Aperture for Partial Discharge Diagnosis", IEEE, Trans. Dielectr. Electr. Insul., Vol. 14, No. 2, pp. 453-460, 2007.
T. Hoshino, K. Kato, N. Hayakawa and H. Okubo, "Frequency Characteristics of Electromagnetic Wave Radiated From GIS Apertures", IEEE Trans. Power Deliv., Vol. 16, No. 4, pp. 552-557, 2001.
T. K. Saha, "Review of Modern Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers", IEEE, Trans. Dielectr. Electr. Insul., Vol. 10, No. 5, pp. 903-917, 2003.
D. Y. Lim, E. H. Choi, S. T. Choi, B. J. Choi, K. S. Lee and S. Bae, "Surface Flashover Characteristics on Poor Contact in $N_2/O_2$ Mixture Gas under Non-Uniform Field", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 29, No. 8, pp. 63-69, 2015.
S. G. Park, E. H. Choi and K. S. Lee, "A Design of Insulted Diagnosis Sensor and the Characteristics of Frequency Spectrum from the Radiated Electromagnetic Waves according to Surface Discharge", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 26, No. 10, pp. 27-34, 2012.
D. Y. Lim and S. Bae, "Study on Oxygen/Nitrogen Gas Mixtures for the Surface Insulation Performance in Gas Insulated Switchgear", IEEE Trans. Dielectr. Electr. Insul., Vol. 22, No. 3, pp. 1567-1576, 2015.
H. C. Miller, "Surface Flashover of Insulators", IEEE Trans. Dielectr. Electr. Insul., Vol. 24, No. 5, pp. 765-786, 1989.
J. S. Lim, K. Park, S. G. Goo, J. Y. Yoon and K, J. Jung, "Measurement of Ultra-High Frequency (UHF) Noise Spectra in GIS Substation", KIEE Summer Conference, pp. 1768-1769, 2003.