1. Alnaser, W. E. 1986. Canterbury, England: University of Kent. Ph.D. Thesis
2. Esnouf, C. and Fantozzi, G. 1977.Proceedings of the Sixth International Conference on Internal Friction and Ultrasonic Attenuation in Solids, Edited by: Hasiguti, R. R. and Mikoshiba, N. 557University of Tokyo Press. 1978,Phys. Stat. sol.(a),47, 201
3. Farman, D. 1977. Canterbury, England: University of Kent. Ph.D. Thesis