Knut Erik Tranøy
(1990). Wittgenstein — ethics and the "wonderful life". In R. Haller, & J. L. Brandl (Eds.). Wittgenstein — eine neubewertung/Wittgenstein — towards a re-evaluation (pp. 273-279). Dordrecht: Springer.
(1987). Science and ethics, some of the main principles and problems. Grazer Philosophische Studien, 30, 11-23. https://doi.org/10.5840/gps1987303.