Al-Khazraji, Ahmed N., Samir A. Amin, and Saad M. Ali. 2015. “Studying and Modeling the Effect of Graphite Powder Mixing Electrical Discharge Machining on the Main Process Characteristics”. Al-Khwarizmi Engineering Journal 11 (3): 20-36. https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/251.