http://www.cs.virginia.edu/~cs415/reading/bacon-garbage.pdf
That said, I'm reading this paper now. It's absolutely fascinating and very approachable. Well worth checking out.
For anyone that still wants to read it, here's a citation -- you can easily find a copy by searching for the title of the paper.
Bacon, David F., Perry Cheng, and V. T. Rajan. "A Unified Theory of Garbage Collection." Convergence 6, no. 17 (2004): 32.
http://www.cs.virginia.edu/~cs415/reading/bacon-garbage.pdf