theropod tooth morphology variance query

[Joseph.Daniel@Colorado.EDU]

I am looking for some references and I hope someone on the list may be able to 
help. I need to find work done on variance in tooth morphology in theropods. 
The catch is that I am looking for intraspecies variation. I can find a slew of 
papers that discuss differences in tooth morphology between species, but I am 
having a hard time with published data on variation within a species. If anyone 
can give me a hand with this, I would be most appreciative.

Joe Daniel