1. SAE paper;CN Cochran,1982
2. SAE Paper;WS Giles,1966
3. SAE Paper;RP Worthen,1986
4. M.J. Tauschek, “Basic Factors Affecting Engine Valves,” Symposium on Internal Combustion Engine Valves (Cleveland, OH: TRW Inc., 1956), pp. 9–20.
5. E.S. Brosius, J.C. Malek, N.K. Petek and M.J. Trzcinski, “Blended Elemental Powder Titanium For Automotive Applications,” Symposium on Titanium Products and Applications (Dayton, OH: Titanium Development Association, 1986).