1. Adriaans, P. 2012. Information. In Stanford encyclopedia of philosophy (Winter 2012 edn), ed. E. Zalta, 1–56. http://plato.stanford.edu/archives/win2012/entries/information .
2. Barceló-Aspeitia, A. 2012. Words and images in argumentation. Argumentation 26: 355–368.
3. Barwise, J., and J. Etchemendy. 1996. Visual information and valid reasoning. In Logical reasoning with diagrams, ed. G. Allwein, and J. Barwise, 3–25. Oxford: Oxford University Press.
4. Barwise, J., and E. Hammer. 1996. Diagrams and the concept of logical system. In Logical reasoning with diagrams, ed. G. Allwein, and J. Barwise, 49–78. Oxford: Oxford University Press.
5. Bateson, G. 1973. Steps to an ecology of mind. Frogmore, At. Albans: Paladin.