R.R. Dickinson.
  <b>A unified approach to the design of visualization software
  for the analysis of field problems</b>.
  In <i>Three-dimensional Visualization and Display Technologies
  (Proceedings of SPIE)</i>, pages 173-180, 1989.
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Dickinson-1989-UAD.bib">(bibtex:
  Dickinson-1989-UAD)</A>.<br />