Sometimes you need to find out quickly whether one of your papers has cited a particular researcher given only the name of that researcher. Is there a tool for that? Assume you have used the bibtex format so far to manage your references, but your bibtex files contain much more than what you've actually cited. You have no Zotero or Mendely and don't want to mess with them unless really necessary. You have your own webpage with lots of paper copies, and you have profiles at Google Scholar, ResearcherId, and Orcid.
Google Scholar and ResearcherID can tell you who cites you. As opposed to that, you wish to determine whether you cite someone else (or not). To start with, a binary answer (yes/no) would do. You would like to run such a query several times, one researcher at a time. Ideally, the query would give you some (or even all) of your papers which cite the given researcher, but it's not a must.
Surely you can do that by putting all your texts together, converting them all to text or html, and then searching there. This is tedious and error-prone, though. Is there any online (or offline) service for that, perhaps? The database in which the search is done must be a (possibly large) underapproximation of the papers you have written so far.