, 1987, 'Modern humanism', Grazer Philosophische Studien 30, 97-119.
, 1981, 'Foundation of justice', Grazer Philosophische Studien 12-13, 251-266.
, 1977a, Genealogy of science and theory of knowledge, in R. E. Butts & J. Hintikka (eds.), Historical and philosophical dimensions of logic, methodology and philosophy of science, Dordrecht, Springer, pp. 173-183.