Actually, I just want to be able to remember the name of this file. Still, "links" could refer to pairs of pork sausages. These are in no particular order.
Technical paper summarizing the author’s philosophy "Metarealistic rendering of real-time interactive computer animations"
Generally readable paper by Hanson, Munzner, and Francis "Interactive Methods for Visualizable Geometry"
A whole book on the subject, now availabe in paperback, the author’s "A Topological Picturebook"
Wikipedia is OK, but Eric Weisstein’s Wofram MathWorld is much better on mathematical subjects.
For the programmer, the books by Jim Blinn "A Trip Down the Pixel Pipeline" appears to be on-line now. Here is a digest of Blinn’s books