1. Alexy R (1990) Grundrechte als subjektive Recht und objektive Normen. Der Staat 29(1990):49–68
2. Alexy R (2002a) A theory of constitutional rights., trans J. Rivers. Oxford University Press
3. Alexy R (2002b) Postscript. In: Alexy R (ed) A theory of constitutional rights., trans J. Rivers. Oxford University Press, pp 388–425
4. Austin J (1873) Lectures on jurisprudence or the philosophy of positive law, vol 1, 4th edn. John Murray, London
5. Bentham J (1970) In: Burns J, Hart HLA (eds) An introduction to the principles of morals and legislation. Athlone, London