1. Albach, H., Brockhoff, K., Eymann, E., Jungen, P., Steven, M., & Luhmer, A. (2013). Theory of the firm Erich Gutenberg’s foundations and further developments. Springer.
2. Alexander, C., Ishikawa, S., & Silverstein, M. (1977). A pattern language: Towns, buildings, construction. Oxford University Press.
3. Anon. (2021). Partially ordered set. Wikipedia. Accessed March 04, 2021, from https://en.wikipedia.org/w/index.php?title=Partially_ordered_set&oldid=1006370755
4. Baecker, D. (1999). Kommunikation in Medien der Information. In R. M. Werber (Ed.), Kommunikation, Medien, Macht. Suhrkamp.
5. Beer, S. (1994). Designing freedom. Wiley.