Rotolo, A. and Sartor, G. (2018). Deductive and deontic reeasoning. In Bongio- vanni, G., Postema, G., Rotolo, A., Sartor, G., Valentini, C., and Walton, D., editors, Handbook of Legal Reasoning and Argumentation. Springer.
Optional Readings
Von Wright, G. H. (1951). Deontic logic. Mind, 60:1–15.
Hilpinen, R. (2001). Deontic logic. In Goble, L., editor, The Blackwell Guide to Philosophical Logic, chapter 8, pages 159–82. Blackwell.