Ryan Cabeen, Arthur W Toga, and David H. Laidlaw.
 <b>Tractography Processing with the Sparse Closest Point
  Transform</b>.
 <em>Neuroinformatics</em>, 19(2):367--378, 2021.
  <a href="http://vis.cs.brown.edu/docs/pdf/g/Cabeen-2021-TPS.pdf.html">(pdf)</a>
  <a href="http://vis.cs.brown.edu/results/bibtex/Cabeen-2021-TPS.bib">(bibtex:
  Cabeen-2021-TPS)</a>.