Watertown Arsenal [Laboratories]: Technical report WAL-TR (series). 620.5/1-1(F). Research on boundary conditions over tool-metal interface in plastic-working conditions: pt. 1, Friction with liquid lubricants in plastic compression: pt. 2, Plastic compression under fluctuating loads [with list of references]; by D. Lee, T. Sata and W. A. Backofen, Massachusetts Institute of Technology.