, 1994, 'Cognitive schemes and truth as an ideal', Philosophy and Phenomenological Research 54 (2), 403-407.
, 1979, 'Is protagorean relativism self-refuting?', Grazer Philosophische Studien 9, 51-68.
, 1977, 'Concepts of relative truth', The Monist 60, 568-582.
, 1976a, 'Psychologism in logic: Husserl's critique', Inquiry 19, 325-339.