[1] Leão F. N., Pashby I. R., A review on the use of environmentally-friendly dielectric fluids in electrical discharge machining, Journal of Materials Processing Technology, Vol. 149, No. 1–3, pp. 341-346, 2004.
[2] Kunieda M., Yoshida M., Taniguchi N., Electrical Discharge Machining in Gas, CIRP Annals-Manufacturing Technology, Vol. 46, No. 1, pp. 143-146, 1997.
[3] Ramani V., Cassidenti M. L., Inert-Gas Electrical Discharge Machining, National Technology Transfer Center (NTTC), NASA, 1985.
[4] Kunieda M., Furuoya S., Taniguchi N., Improvement of EDM Efficiency by Supplying Oxygen Gas into Gap, CIRP Annals - Manufacturing Technology, Vol. 40, No. 1, pp. 215-218, 1991.
[5] Kunleda M., Miyoshi Y.,. Takaya T, Nakajima N., ZhanBo Y., Yoshida M., High Speed 3D Milling by Dry EDM, CIRP Annals - Manufacturing Technology, Vol. 52, No. 1, pp. 147-150, 2003.
[6] Kunieda M., Takaya T., Nakano S., Improvement of Dry EDM Characteristics Using Piezoelectric Actuator, CIRP Annals - Manufacturing Technology, Vol. 53, No. 1, pp. 183-186, 2004.
[7] Singh P. N., Raghukandan K., Pai B. C., Optimization by Grey relational analysis of EDM parameters on machining Al–10%SiCP composites, Journal of Materials Processing Technology, Vol. 155–156, No. 0, pp. 1658-1661, 2004.
[8] Roy R. K., Design of Experiments Using The Taguchi Approach: 16 Steps to Product and Process Improvement: Wiley, 2001.
[9] Deng J. L., Introducion to grey systems, The journal of grey sysems, Vol. 1, pp. 1-24, 1989.
[10] Lin J. L., Lin C. L., The use of the orthogonal array with grey relational analysis to optimize the electrical discharge machining process with multiple performance characteristics, International Journal of Machine Tools and Manufacture, Vol. 42, No. 2, pp. 237-244, 2002.
[11] Sivasankar S., Jeyapaul R., Application of Grey Entropy and Regression Analysis for Modelling and Prediction on Tool Materials Performance During EDM of Hot Pressed ZrB2 at Different Duty Cycles, Procedia Engineering, Vol. 38, No. 0, pp. 3977-3991, 2012.
[12] S. Fattahi, H. Baseri, Analysis of dry electrical discharge machining in different dielectric mediums, Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, Vol. 231, No. 3, 2017.