1. Bar-Hillel, Y. (1964). Language and information: Selected essays on their theory and application. Reading: Addison-Wesley.
2. Bar-Hillel, Y., & Carnap, R. (1953). An outline of a theory of semantic information. Rep. in Bar-Hillel [1964], pp. 221–274.
3. Floridi, L. (2010a). Information: A very short introduction. Oxford: Oxford University Press.
4. Floridi, L. (2010b). The philosophy of information. Oxford: Oxford University Press.