Eike-Henner W. Kluge
(1987). Non-naturalism revisited: rights/obligations as emergent entities. Grazer Philosophische Studien 30, pp. 139-160.
(1980). Bolzano and Frege: some conceptual parallels. Grazer Philosophische Studien 10, pp. 21-41.
(1980). The metaphysics of Gottlob Frege: an essay in ontological reconstruction, Springer, Dordrecht.
(1973). Review of Edmund Husserl, Philosophie der Arithmetik. Dialogue 12, pp. 147-150.