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Re:The science of science by jkan on Wednesday May 04, 2011 @01:50AM (#2512921)
I think they're talking about this one:

http://projecteuclid.org/euclid.aoas/1183143727

This work uses the correlated topic model, which extends LDA to model correlations among the extracted topics.

Edit: and this one [pdf]:

http://www.icml2010.org/papers/384.pdf

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