1. Armstrong, D. (1983). What is a law of nature?. Cambridge: Cambridge University Press.
2. Beatty, J. (1992). Random drift. In E. Keller & E. Lloyd (Eds.), Keywords in evolutionary biology (pp. 273–281). Cambridge: Harvard University Press.
3. Hajek, A. (1997). Mises Redux—Redux: Fifteen arguments against finite frequentism. Erkenntnis, 45, 209–227.
4. Hempel, C. G. (1965). Aspects of scientific explanation and other essays in the philosophy of science. New York: Free Press.
5. Hempel, C. G., & Oppenheim, P. (1948). Studies in the logic of explanation. Philosophy of Science, 15, 135–175.