9Kristina Markovic. Contact Stresses in Gear Teeth Due to Tip Relief Profile Modification[ J]. Engineering Review, 2011,31 ( 1 ) : 19 - 25.
10Wang J, Howard I. The torsional stiffness of involute spur gears[J]. Pro- ceedings of the h,stitution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science,2004,218( 1 ) : 131 - 142.
