9.
Experimental analysis of shim–tappet dynamics and friction modifier effects in engine valvetrain using an advanced measurement technique
Sehrish Shahnawaz, Riaz Ahmad Mufti, Muhammad Talha Manzoor, Waleed Al-Sallami, Mian Ashfaq Ali, Rehan Zahid, Jawad Aslam, Muhammad Khurram
Tribology International