Yohanes, Yohanes, 		Azmi, Anugra, AND 		Abdurrahman, Ridwan.
" The Study of Male-Female Chamfer Angle Effect on Aluminum 6061 Forging at Rotary Friction Welding Process" <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], Volume 65 Number 2 (30 July 2021)