1. T.R. Thomas, Rough Surfaces, Longman, London, 1982.
2. A. Wennerberg, On Surface Roughness and Implant Incorporation, Dissertation, Gothenburg, 1996.
3. D.J. Whitehouse, Handbook of Surface Metrology, Institute of Physics Publishing, Bristol, 1994, pp. 10–20.
4. Surface topography as a nonstationary random process
5. The properties of random surfaces of significance in their contact