Andrew Hanson and Hui Ma.
  <b>Space Walking</b>.
  In <i>Proceedings of Visualization '95</i>, pages 126-133. IEEE
  Computer Society Press, 1995.
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Hanson-1995-SPW.bib">(bibtex:
  Hanson-1995-SPW)</A>.<br />