I am certain I read article that was posted on YN a month or so ago about some researchers that were caught using false citations in their research.
If I remember correctly, some group used an AI tool to sniff for AI citations in other's works. What I remember most was how abhorrent some of the sources that the AI sniffer caught. One of the citation's authors was literally cited as "FirstName LastName" -- didn't even sub in a fake name lol.
Edit: I found the OP: