1. Glossary of Terms and Definitions in the Field of Friction and Lubrication, Part I, OECD, 1969, p. 64.
2. Peterson, M.B., M.K. Gabel and M.J. Devine, ASTM Standardization News, 9–12 Sept. 1974
3. International Study Committee for Wear Test of Flooring Materials;Wear,1961