1. Feynman, R. P. Engineering and Science 22–36 (February 1960).
2. Feynman, R. P. Saturday Review 45–47 (2 April 1960)
3. Feynman, R. P. Popular Science 114–116; 230–232 (November 1960).
4. Feynman, R. P. California Institute of Technology Quarterly 2, 2–10 (Fall 1960).
5. Feynman, R. P. in Miniaturization (ed. Gilbert, H.) 282–296 (Reinhold, 1961).