> Then, checking on Google Scholar, Heneberg saw that many of the remaining papers actually had been referenced by other works indexed in the Web of Science, but had been missed because of data-entry errors or typos in the papers<p>I wonder if you could look at the number of citations to non-existent papers to find these typos. If you collected such a set, you could do a loose search against the list of published papers, and see how many are a close match. For instance, a typo in an author's name or the paper's title could be ignored while matching the journal, date and page could give the auditors a list of best guesses for this missed citations.