1. Dubois, G. B., E. W. Ocvirk, R. L. Wehe, NASA TN D 427 (1960).
2. Okrent, E. H. ASLE Trans.4, 97 (1961);7, 147 (1964).
3. Savage, M. W., L. D. Bowman ASLE Trans.4, 322 (1961).
4. Harnoy, A., W. Philippoff, ASLE/ASME Lubrication Conference (ASLE Paper No. 75-LC-5B-1) (Miami Beach 1975).
5. Horowitz, H. H., F. E. Steidler ASLE Trans.3, 124 (1960).