1. Holton, G. Daedalus 125, 183–208 (1996).
2. Misell, D. L. in Practical Methods In Electron Microscopy (ed. Glauert, A. M.) Vol. 7. Analysis, Enhancement and Interpretation (North-Holland, New York, 1978).
3. Hadamard, J. The Psychology of Invention in the Mathematical Field (Princeton Univ. Press, 1945).
4. Poincaré, H. The Foundations of Science (Univ. Press of America edition, Lanham, MD, 1982)
5. Frankel, F. Envisioning Science: The Design and Craft of the Science Image (MIT Press, Cambridge, MA, 2002).