1. Nowak, M.A.: Five rules for the evolution of cooperation. Science 314(5805), 1560–1563 (2006).
http://science.sciencemag.org/content/314/5805/1560
2. Dugatkin, L.A.: Cooperation Among Animals: An Evolutionary Perspective. Oxford University Press, Oxford (1997)
3. Watson, A.: Diplomacy. Routledge, London (1984)
4. Hamel, G., Doz, Y.L., Prahalad, C.K.: Collaborate with your competitors-and win. Harv. Bus. Rev. 67(1), 133–139 (1989).
https://hbr.org/1989/01/collaborate-with-your-competitors-and-win
5. Johnson, D.W., Johnson, R.T., Smith, K.A.: Active Learning: Cooperation in the College Classroom. Interaction Book Company, Edina (1991)