Johnson, Jim. 1988. “Mixing Humans and Nonhumans Together: The Sociology of a Door-Closer.” Social Problems 35:298-310. PDF

Law, John. 1992. "Notes on the Theory of the Actor Network: Ordering, Strategy and Heterogeneity". Center for Science Studies, Lancaster University. PDF

Mackenzie, Donald. 1996. Chapter 3. “Economic and Sociological Explanations of Technological Change” in Knowing Machines. Cambridge, MA: MIT Press.