17. The system of claim 16 , wherein a given one of the cited documents comprises a cited research paper not written by the author of the primary research paper, wherein the operation further comprises: at the designated time, for each cited document, re-evaluating the cited reference using the set of annotators to derive a third collection of one or more assertions regarding the cited reference; comparing the assertions in the first collection of assertions and the assertions in the third collection of assertions to identify any conflicts between the first collection of assertions and the third collection of assertions; and in response to identifying a conflict and without requiring any user input, programmatically notifying the author of the primary research document that the cited research paper has changed.
16. The system of claim 15 , wherein the indication specifies approval of at least one of: (i) the citing content unaltered in the primary research document in light of the first monitored change; and (ii) an updated version of the citing content in light of the first monitored change; wherein the operation further comprises scheduling each of the one or more cited references for a subsequent re-evaluation at a designated time.