1. Fletcher, G. (1977). Rethinking criminal law. Boston: Little, Brown & Co.
2. Gardner, J. (1996). Justifications and reasons. In A. P. Simester, & A. T. H. Smith (Eds.), Harm and culpability. Oxford: Clarendon Press.
3. Gardner, J. (2004). Book review. Ethics, 114, 827.
4. Glover, J. (1975). It makes no difference whether or not I do it. Aristotelian Society Supplementary Volume, 49, 171.
5. Hart, H. L. A., & Honoré, T. (1985). Causation in the law (2nd ed.). Oxford: Clarendon Press.