1. Austin, John: 1832; The Province of Jurisprudence Determined.
2. Bacon, Francis: 1620; Novum Organum.
3. Blackstone, William: 1765; Commentaries on the Laws of England, Vol. I.
4. Carnap, Rudolf: 1950; Logical Foundations of Probability, Routledge and Kegan Paul, London.
5. Carnap, Rudolf: 1971, ‘A Basic System of Inductive Logic’, in R. Carnap and R. C. Jeffrey (ed.), Studies in Inductive Logic and Probability, University of California Press, Berkeley, pp. 33–165.