1. Ibid., pp. 304–9.
2. NEUBER, H. Kerbspannungslehre, Second Edition, p. 112, 1958.
3. “Stresses in Keyways by Photoelastic Method and Comparison with Numerical Solution”;LEVEN;Proc. S.E.S.A.,1949
4. “On the Torsion of a Shaft with Keyways”;OKUBO;Quart. J. Mech. Appl. Math.,1950