Ralph C. S. Walker


, 2017, The primacy of practical reason, in , The Palgrave Kant handbook, New York, Palgrave Macmillan, pp. 191-209.

, 1977, 'Identität und Objektivität', Grazer Philosophische Studien 4, 189-197.

, 1974a, The status of Kant's theory of matter, in L. White Beck (ed.), Kant's theory of knowledge, Dordrecht, Springer, pp. 151-156.