1. Bray C.J. in Brown and Morley [1968] S.A.S.R. 467
2. Beckford v. The Queen [1987] 3 W.L.R. 611
3. Gearty's Dr comments in [1987] C.L.J. 203
4. Williams , Criminal Law: The General Part, 2nd ed. (1961), p. 760
5. Smith J. C. Professor in [1987] Crim.L.R. 480