Nicholas J. Wade.
 <b>Charles Wheatstone (1802&mdash;1875)</b>.
 <em>Perception</em>, 31:265--272, 2002.
  <a href="http://vis.cs.brown.edu/docs/pdf/g/Wade-2002-CWE.pdf.html">(pdf)</a>
  <a href="http://vis.cs.brown.edu/results/bibtex/Wade-2002-CWE.bib">(bibtex:
  Wade-2002-CWE)</a>.