1. Biggs, Michael/Pichler, Alois: Wittgenstein. Two Source Catalogues and a Bibliography. Catalogues of the Published Texts and of the Published Diagrams, each Related to its Sources. Bergen 1993.
2. Erbacher, Christian: Wittgenstein and His Literary Executors. In: Journal for the History of Analytical Philosophy 4/3 (2016), 1–39. DOI: https://doi.org/10.15173/jhap.v4i3.2703.
3. Erbacher, Christian: »Good« Philosophical Reasons for »Bad« Editorial Philology? On Rhees and Wittgenstein’s ›Philosophical Grammar‹. In: Philosophical Investigations 42/2 (2019), 111–145.
4. Fabian, Reinhard: Inventarverzeichnis zu den Sammlungen der Wiener-Kreis-Bewegung (1924–1938) (2007). In: https://docplayer.org/42143245-Noord-hollands-archief-haarlem-wiener-kreis-archief.html (28.2.2022).
5. Gabler, Hans Walter: Wittgenstein’s Nachlass. The Bergen Electronic Edition. In: Paula Henrikson/Christian Janss (Hg.): Geschichte der Edition in Skandinavien. Berlin 2013, 167–176.