Mei and Zhai (2008) presented a sophisticated generative approach that frames summarisation under an Information Retrieval (IR) context.
an impact language model for a paper is first built as a mixture of a language model estimated from the paper's own text, and a weighted citation language model based on its collective citation contexts, using a compound coefficient reflecting both a sentence's proximity to the citation label (anchor) in the citing paper and the citing paper's authority calculated from the citation network using PageRank (Brin and Page, 1998).