1. Peterson , M. B. and Florek , J. J. “ Sliding Characteristics of Metals at High Temperature ”, Symposium Engineering approach to Surface Damage. University of Michigan, July 15, 1958 .
2. Johnson , Robert L. , Odfrey , Douglas and Bisson , E. E. “ Friction at High Sliding Velocities ”, NACA TN 1442, 1947 .