18. The computer system of claim 10 , wherein the memory storage stores one or more instructions that, when executed, further instruct the computer system to perform: 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.
19. The computer system of claim 18 , wherein the set of one or more recommended sources is determined based on at least the search terms and the selected citation.