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What's wrong with that PMC ID? I see the same paper in both locations, the 1922 paper which begins "In a former paper the author communicated a number of properties of every real function f(x)" etc. Nemo 22:14, 5 January 2024 (UTC) reply

There are two 1922 papers by Blumberg in the bibliography. The first one, paper S, was published in Proceedings of the National Academy of Sciences, is only six pages long, has no proofs, and has ID PMC  1085149. The second, paper L, was published in Transactions of the American Mathematical Society, is sixteen pages long, and has proofs. Both papers have the title "New properties of all real functions" and a first sentence which begins "In a former paper the author communicated a number of properties of every real function f(x)..." User:OAbot erroneously added the PMC ID for paper S to the citation for paper L. Dmoews ( talk) 01:26, 6 January 2024 (UTC) reply

The error is similar to those pointed out by User:David Eppstein. Dmoews ( talk) 01:53, 6 January 2024 (UTC) reply

Some older instances of the same sort of error were instead added by Citation bot, but this one appears to be the fault of OAbot. — David Eppstein ( talk) 07:41, 6 January 2024 (UTC) reply

Ah, thank you for clarifying. Filed as phabricator:T354472. OAbot doesn't really do title matches, but Citation bot does for PMC (or used to). So as David Eppstein says usually these errors are caused by a previous addition of the wrong DOI by Citation bot or others, but in this case it seems to be an error in Unpaywall. I think I can work around it, just have to decide in which way. Thank you for your patience, Nemo 10:11, 6 January 2024 (UTC) reply