Farkhan, F., Y. A. Purwanto, W. Hermawan, and E. Hambali. “Dynamical Performance Analysis of Moving Part Material Replacement from Cast Iron to EFB Fiber Filled Epoxy of CNC Woodworking Machinery”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 27, no. 3, June 2016, pp. 204-25, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/5859.