George G. Robertson, Stuart K. Card, and Jock D. Mackinlay.
 <b>Nonimmersive virtual reality</b>.
 <em>IEEE Computer</em>, 26(2), February 1993.
  <a href="http://vis.cs.brown.edu/docs/pdf/bib/g/Robertson-1993-NVR.pdf.html">(pdf)</a>
  <a href="http://vis.cs.brown.edu/results/bibtex/Robertson-1993-NVR.bib">(bibtex:
  Robertson-1993-NVR)</a>.