1. H. Al-Hofy, Advanced Machining Process, Nontraditional and Hybrid machining, First Edition, Chapter 4, McGraw-Hill Company, Egypt, 77–99, (2005).
2. U. Mallick, Estimation Of MRR By Using U-Shape Electrode In Electrochemical Machining, MSC Thesis, National Institut Technology, India, (2009).
3. K. Meher and B. K. Nada, ECM Process Characteristics, Department of Mechanical Engineering National Institute of Technology Rourkela, 8–26, (2009).
4. Noor. A. Mohammed Ali, Electrochemical Process Based on ANN Technique, M.Sc. Thesis, University of Technology, Iraq, (2011).
5. L. G. Twidwell and D. R. Dahnke, Treatment of Metal Finishing Sludge For Detoxification And Metal Value, The European Journal Of Mineral Processing And Environmental Protection Vol.1, No. 2, 76–88, (2001).