George P. Murdock (1945), "The Common Denominator of Culture," in The Science of Man in the World Crisis, Ralph Linton (ed.). New York: Columbia University Press.
Rik Pinxten (1976) "Epistemic Universals: A Contribution to Cognitive Anthropology," in Universalism Versus Relativism in Language and Thought, R. Pinxten (ed.). The Hague: Mouton.