Boumans, M. and Davis, John B. (2015), Economic Methodology: Understanding Economics as a Science, Palgrave Macmillan, pp. 92.
Popper, Karl (2013), The Poverty of Historicism, Routledge, p. 141.
This use of this summary is from Boumans and Davis (2010).
Koertge, N. (1975), "Popper's Metaphysical Research Program for the Human Sciences", Inquiry, 18 (1975), 437–62.