Carolina Cruz-Neira, Daniel J. Sandin, and Thomas A. DeFanti.
 <b>Surround-screen Projection-based Virtual Reality: The Design
  and Implementation of the CAVE</b>.
 In <em>Proceedings of ACM SIGGRAPH</em>, volume&nbsp;27, pages 135--142. ACM,
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  <a href="http://vis.cs.brown.edu/docs/pdf/bib/g/Cruz-1993-SSP.pdf.html">(pdf)</a>
  <a href="http://vis.cs.brown.edu/results/bibtex/Cruz-1993-SSP.bib">(bibtex:
  Cruz-1993-SSP)</a>.