I wondered whether a question like this would be on-topic on academia.SE: Recent citation of an article - on topic on Main site?. (In fact, I thought it was likely that a question like that had been already asked. But when I searched a bit I failed to find an older question about this.)

@MartinSleziak Asking about the last citation to a specific article would not be on-topic. Asking how to do this would be. However, this is not much different from finding all citations of an article (and then sorting by date). Also, it makes me wonder why anybody would need this.

The OP mentioned a hypothetical scenario, where this might be useful.

I thought I'd find some question which lists several possibilities for finding citations in answers. Maybe I just wasn't lucky enough. I searched mainly in the citations tag.

@MartinSleziak Ah, I misread that. The rest of my reply still stands.

@MartinSleziak Given that finding all citations of an article is a prominent feature of many websites like Google Scholar, ISI, etc., it would not surprise me if this was never asked. Maybe nobody failed to find this feature yet …

So should I poste a comment directing the OP to Academia website? Do you think the question suggested there would "survive" here?

I mean if it is closed as duplicate, that's perfectly fine - that at least directs the OP to further resources.

But do you think it will not be closed as off-topic? (Your last comment maybe suggests it is to easy...?)

@MartinSleziak I have no objections; just recommend that they clearly ask about the how. Too easy is not a reason for closing (if anybody claims otherwise, report them to me so I can lapidate them with navel fluff).

@Wrzlprmft Thanks for the help! Now it's up to the OP whether they decide to ask here.