1. Bauersfeld, H. (1998). About the notion of culture in mathematics education. In F. Seeger, J. Voigt, & U. Waschescio (Eds.), The culture of the mathematics classroom (pp. 375–389). Cambridge, UK: Cambridge University Press.
2. Brousseau, G. (1997). In Theory of didactical situations in mathematics. N. Balacheff, M. Cooper, R. Sutherland, & V. Warfield (Eds.), Dordrecht, The Netherlands: Kluwer Academic Press.
3. Buchler, J. (1955). Philosophical writings of Peirce. New York: Dover Publications.
4. Condillac, E. B. (1971/1756). An essay on the origin of human knowledge. Translated by R. G. Weyant. Gainesville, Florida: Scholars’ Fascimiles & Reprints.
5. Corrington, R. (1993). An introduction to C. S. Peirce: Philosopher, semiotician, and ecstatic naturalist. Lanhan, Maryland Publishers: Rowman & Littlefield.