1. Precipitation hardening
2. Bethge, H., Krohn, M. and Stenzel, H. 1987.Electron Microscopy in Solid State Physics, Edited by: Bethge, H. and Heydenreich, J. p. 202Elsevier: Amsterdam.
3. Atomic Force Microscope
4. Bradley, D. E. 1965.Techniques for Electron Microscopy, Edited by: Kay, D. H. p. 96Blackwell Scientific: Oxford. second edition
5. Brown, L. M. and Ham, R. K. 1971.Strengthening Methods in Crystals, Edited by: Kelly, A. and Nicholson, R. B. p. 9Applied Science: London.