Running SW2011 SP5.0

I have an assembly, with 80 parts. 

I want to delete one part.

But maybe other parts' geometry are tied to the part I want to delete.

So first I want to see which other parts, if any, are referencing the part I'm going to delete.

So I know which parts I will need to repair if I delete that part from the assembly.

Help section says Find References - "Lists files referenced by the active part."

I want to do the opposite - see which files are referencing the active part.

So the part I want to delete is referenced by....  which parts?