@misc{hug-93-opgrev-comm,
  author = {John F. Hughes},
  title = {Comments on his 1993 Review of ``{Oriented} {Projective} {Geometry}: {A} {Framework} for {Geometric} {Computations}'' by {Jorge} {Stolfi}},
  howpublished = {Online document, accessed 2007-05-25 and 2022-03-07},
  url = {http://cs.brown.edu/people/jhughes/papers/Hughes-OPG-1993/main.htm},
  note = {``\emph{I do wish I had been more charitable in my youth. Stolfi's book is basically really good, although it does have some flaws; unfortunately in my review I concentrated on the flaws. Now that I'm older and, if not wiser, at least a little less unkind, I would write about what's good --- the underlying ideas, the beautiful formulations of things, the accessibility of the work, and the important applications --- and be less picky about details, and the fact that oriented projective geometry is really more or less equivalent to "spherical geometry," which was known and developed by Riemann. Riemann, of course, did prove a good deal about the sphere, but Stolfi tells us things that are computationally important and worthwhile, but which weren't really even reasonable questions in Riemann's day. So, far too late, I now recommend this book to those working in graphics.}''}
}