6. The method of claim 1 , further comprising: receiving a selection of one of the citations; and in response to the selection: providing for display a list of a subset of documents, the subset of documents including documents from the set of documents that include the selected citation, and providing for display a set of one or more recommended sources in which to search for documents.
6. The method of claim 1 , further comprising: receiving a selection of one of the citations; and in response to the selection: providing for display a list of a subset of documents, the subset of documents including documents from the set of documents that include the selected citation, and providing for display a set of one or more recommended sources in which to search for documents. 7. The method of claim 6 , wherein: the set of one or more recommended sources is determined based on the search terms and the selected citation.