Tysklandsstudentene (1946) (co-authored with Michael Sars)
On the Logic of Normative Systems (1953, thesis)
Thomas Aquino som moralfilosof. 1957.
The Moral Import of Science. Essays on Normative Theory, Scientific Activity and Wittgenstein (1998)
References
^Knut E. Tranøy, "Wittgenstein in Cambridge 1949–1951: Some Personal Recollections", in: F. A. Flowers III, Ian Ground (eds.), Portraits of Wittgenstein: Abridged Edition, Bloomsbury Academic, 2018, p. 452.