The foundational debate : complexity and constructivity in mathematics and physics / ed. by Werner DePauli-Schimanovich, Eckehart Köhler and Friedrich StadlerGame theory, experience, rationality : foundations of social sciences, economics and ethics : in honor of John C. Harsanyi / ed. by Werner Leinfellner and Eckehart KöhlerAlfred Tarski and the Vienna Circle : Austro-Polish connections in logical empiricism / ed. by Jan Woleński and Eckehart KöhlerDevelopments in the methodology of social science / ed. by Werner Leinfellner and Eckehart Köhler