https://www.hendrenwriting.com/showcase-entries/on-computable-numbers-with-an-application-to-the-entscheidungsproblem
On Computable Numbers, with an Application to the Entscheidungsproblem — Hendren Writing
Turing, Alan Proceedings of the London mathematical society 2, no. 1 (1937): 230-265
on computable numberswith anto theapplicationentscheidungsproblem