1. Breivik, G. 2007. “The Quest for Excitement and the Safe Society.” In Philosophy, Risk and Adventure Sports, edited by Mike McNamee, 10–24. London: Routledge.
2. Trends in adventure sports in a post-modern society
3. Sport as part of a meaningful life
4. Freud, S. 2003. Beyond the Pleasure Principle and Other Writings. London: Penguin Books.
5. Hansson, S. O. 2023. “Risk.” In The Stanford Encyclopedia of Philosophy Summer 2023, edited by N. Edward.Zalta & Uri Nodelman, https://plato.stanford.edu/archives/sum2023/entries/risk/.