T. Munzner.
  <b>Exploring Large Graphs in 3D Hyperbolic Space</b>.
  <i>IEEE Comput. Graph. Appl.</i>, 1998.
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Munzner-1998-ELG.bib">(bibtex:
  Munzner-1998-ELG)</A>.<br />