Journal の
- Logica Universalis, Special Issue: Perspectives on the History and Philosophy of Modern Logic: Van Heijenoort Centenary, vol. 6, nos. 3-4, 2012
から、
- Irving H. Anellis ''Jean van Heijenoort’s Contributions to Proof Theory and Its History''
- Jaakko Hintikka ''Which Mathematical Logic is the Logic of Mathematics?''
- Ignacio Angelelli ''Frege’s Ancestral and Its Circularities''
を入手。