8. The method of claim 1 , wherein the graphical summary further comprises: a second node that is representative of an annotation made to the research document by a non-author of the research document, at least a portion of the annotation displayed in graphical relation to the second node; and an edge that couples the node to the second node.
1. A method executed by a processor of a computing device, the method comprising: generating a graphical summary of a research document for presentment on a display of a computing device in response to receipt of user input that identifies the research document, the research document having a publication date assigned thereto that indicates a date upon which the research document was published, the graphical summary of the research document is based upon content from other research documents, the other research documents include citations to the research document, the other research documents having publication dates that are subsequent to the publication date of the research document, the graphical summary of the research document comprises: a node that is representative of the research document; and portions of sentences in the other research documents that include the citations to the research document; and presenting the graphical summary of the research document on the display of the computing device.