Yohanes, Yohanes, 		Siregar, Erikson, 		Susilawati, Anita, AND 		Badri, Muftil.
" Performance Analysis of Flywheel Addition on Drive System of Rotary Friction Welding Machine" <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], Volume 52 Number 1 (8 October 2018)