The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Wikipedia's[2][3] article on Turing's proof dates the submission without hedging: "Turing's proof is a proof by Alan Turing submitted on 12 November 1936 and first published in 1937 with the title 'On Computable Numbers, with an Application to the Entscheidungsproblem'." The pin is the submission, which is the dated act; the Proceedings of the London Mathematical Society issue carrying it is dated 1937.
Dates the submission and publication and explains what the paper proves: "the second proof (after Church's theorem) of the negation of Hilbert's Entscheidungsproblem... that some decision problems are 'undecidable'".[1]
The author's own article, for where he was working in 1936 and what the machine he defined became.[1]
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