1. The Friction and Lubrication of Solids;Bowden,1958
2. Brit. Patent 1,165, 085 (Sept. 24, 1969), to K. G. Allum and E. S. Forbes, British Petroleum Co. Ltd.
3. U.S. Patent 3, 284, 518 (Nov. 8, 1966), to G. W. Ayers and W. A. Krewer, Union Oil Co. of California.