1. Research on the mechanisms of fretting fatigue;Hoeppner,1972
2. Fretting resistant coatings for titanium alloys;Padberg;AFML-TR-71-184,1971
3. Wear resistant coatings for titanium alloys: fretting fatigue of uncoated Ti-6A1-4V;Betts;AFML-TR-71-212,1971
4. Lockheed-California Company, unpublished research and development results.
5. Fretting fatigue in titanium helicopter components;Salkind,1972