“A note on Professor Törnebohm´s article ‘On truth, implication, and three-valued logic’“, Theoria, 23, 1957, pp. 193-194. Co-author.
Om “tror”-satser, Svensk teologisk kvarttalsskrift, 33, 1958, pp. 146-150. Co-author.
“Den bruna boken och den blå”, Götheborgske Spionen, No. 7, 1958, pp. 12-13.
“Wittgenstein och den intellektuella ärligheten”, Dagens Nyheter, 14.7.1959, p. 3. Co-author.
“If I carefully examine a visual after-image, what am I looking it and where is it?” , Analysis, 19, 1959, pp.99-100. Co-author.
