7Universiti Putra Malaysia, Selangor. Pendulum impact test rig: US, 6990845[P]. 2006-01-31[2009-08-16]. http://www. freepatentsonline.com/6990845.html.
8Zorowski C F. Mathematical Prediction of Dynamic Tire Be havior[J]. Tire Science and Technology, 1973,1 (1) : 99-117.
9DeEskinazi J, Soedel W, Yang T Y. Contact of an Inflated To roidal Membrane with a Flat Surface as an Approach to the Tire Deflection Problem [J]. Tire Science and Technology, 1975,3(1) :43-61.
10Kaga H ,Okamoto K,Tozawa Y. Stress Analysis of a Tire un- der Vertical Load by a Finite Element Method[J]. Tire Sci- ence and Technology, 1977,5 (2) .. 102-118.