"The Origin of Hilbert's Axiomatic Method". In: Jürgen Renn et  al (eds.). The Genesis of General Relativity, Vol. 4 Theories of Gravitation in the Twilight of Classical Physics: The Promise of Mathematics and the Dream of a Unified Theory, New York, Springer (2006), pp. 139-236.
The final publication is available at ( link.springer.com)