1. Alexy, Robert. 1994. Theorie der juristischen Argumentation. 7e Auflage. Frankfurt a/M: Suhrkamp.
2. ———. 2002. The Argument from Injustice. A Reply to Legal Positivism. Oxford: Oxford University Press.
3. Dworkin, Ronald. 1978. Taking Rights Seriously. 2nd ed. London: Duckworth.
4. ———. 1986. Law’s Empire. London: Fontana.
5. Fuller, Lon L. 1963. The Morality of Law. rev. ed. New Haven: Yale University Press.