, 1978, Motivational disturbances and free will, in T. Engelhardt & S. Spicker (eds.), Mental health: philosophical perspectives, Dordrecht, Springer, pp. 201-220.
, 1969a, Précis of "a mistake about justified belief", in L. Gabriel (ed.), Sektionen I-IV, Freiburg-Basel-Wien, Herder, pp. 176-177.