1. Ayer, A.J.: Language, Truth, and Logic, 2nd edn. Gollancz, London (1936, 1946)
2. Burgin, M.: Super-Recursive Algorithms. Springer (2005)
3. Carnap, R.: An introduction to the Philosophy of Science. Basic Books (1966)
4. Chomsky, N.: Syntactic Structures. Mouton, The Hague (1957)
5. Elidan, G., Friedman, N.: Learning Hidden Variable Networks: The Information Bottleneck Approach. Journal of Machine Learning Research (JMLR) 6, 81–127 (2005)