1. Anderson, P. (Dir.), Davis, J., Carol, G., Giler, D., & Hill, W. (Prods.). (2004). Alien vs. Predator. 20th Century Fox.
2. Arnaud, J.-J. (Dir.), Dorfmann, J., Kemeny, J., Belmont, V., Héroux, D., & Gruskoff, M. (Prods.). (1981). Quest for fire. 20th Century Fox.
3. Baron, C. (2011). A web of controversies: Complexity in the Burgess Shale debate. Journal of History of Biology, 44(4), 745–780.
4. Begon, M., Townsend, C. R., & Harper, J. L. (2009). Ecology: From individuals to ecosystems. Oxford: Blackwell Publishing.
5. Bonde, N., & Brantsen, A. (1982). Kampen om Ilden. [Quest for Fire]. Levende Billeder, 8(9), 4–10.