Find and remove circular references.

The reason I want to find these is that I want to minimise full GCs.
Incremental GCs can remove object with no references, but objects with circular references require a full GC which comes at a high cost for the project I am working on and to be avoided if possible.
So is there is a tool to help find these (so they can be broken on resources disposal or refactored out)
It should be possible to write such a tool with refection, but I was wondering if there was one already. (google didn't help much)

http://www.amazon.com/Garbage-Collection-Algorithms-Automatic-Management/dp/0471941484/ref=sr_1_2?ie=UTF8&s=books&qid=1223338239&sr=1-2

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duplicate annihaitor
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Find and remove circular references.

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