(4) O. D. Sherby, J. L. Lytton and J. E. Dorn: Acta Meta11., 5 (1957), 219.
(5) J. E. Bird, A. K. Mukherjee and J. E. Dorn: Quantitative Relation between Properties and Microstructure, ed. by D. G. Brandon and A. Rosen (Israel Univ. P., 1969), p.255.