Introduction to SiteSwaps: A concise introduction to the written juggling notation called SiteSwaps.
Juggling Drops and Descents: Complex math and applications to juggling patterns. A joint research by Joe Buhler of Reed College and Ron Graham of AT&T Bell Labs.
Juggling Theory: An introduction to siteswap notation, illustrated by animated gifs.
Siteswap FAQ: Provides answers to common questions about siteswap notation.
The Science of Juggling: A paper from Scientific American, November 1995. Includes an overview of learning mechanisms, robot jugglers, and mathematical theory.