1. Armstrong, R. W. 1963.Iron and Its Dilute Solid Solutions, Edited by: Spencer, C. W. 263New York: Interscience. 1964,Deformation twinning, edited by R. E. Reed-Hill, J. P. Hirth and H. C. Rogers (New York: Gordon and Breach), p. 356.
2. Armstrong, R. W., Bechtold, J. H. and Begley, R. T. 1963.Refractory Metals and Alloys II, Vol. 17, 159New York: AIME and Interscience.
3. Armstrong, R. W. and Worthington, P. J. 1973.Metallurgical effects at high strain rates, Edited by: Rhode, R. W., Butcher, B. M., Holland, J. R. and Karnes, C. H. 401New York: Plenum.
4. Screw dislocation in a model sodium lattice
5. Bilby, B. A. and Eshelby, J. D. 1968.Fracture, An Advanced Treatise, Edited by: Liebowitz, H. Vol. 1, 142New York: Academic. chap, 2