1. Baker, Gordon/Hacker, Peter Michael Stephan: Wittgenstein. Rules, Grammar and Necessity. Volume 2 of An Analytic Commentary on the Philosophical Investigations. Essays and Exegesis of §§ 185–242. Oxford 2009.
2. Engelmann, Mario Luiz: Wittgenstein’s Philosophical Development: Phenomenology, Grammar, Method, and the Anthropological View. Basingstoke 2013.
3. Floyd, Juliet: Prose versus Proof: Wittgenstein on Gödel, Tarski and Truth. In: Philosophia Mathematica 9/3 (2001), 280–307.
4. Floyd, Juliet: Turing, Wittgenstein and Types: Philosophical Aspects of Turing’s ›The Reform of Mathematical Notation and Phraseology‹ (1944–5). In: S. Barry Cooper/Jan van Leeuwen (Hg.): Alan Turing: His Work and Impact. Amsterdam/Burlington, MA 2013, 250–253.
5. Floyd, Juliet: Chains of Life: Turing, Lebensform, and the Emergence of Wittgenstein’s Later Style. In: Nordic Wittgenstein Review 5/2 (2016), 7–89.