Schroeder-Heister, Peter(1984); Wissenschaftlicher Artikel; Frege Conference 1984. Proceedings of the International Conference Held at Schwerin (GDR), September 10-14, 1984. Ed. by G. Wechsung. Berlin: Akademie-Verlag 1984, pp. 182–188
Butter, Michael(2011); Wissenschaftlicher Artikel; Arnold Schwarzenegger – interdisciplinary perspectives on body and image / ed. by Michael Butter. - (2011), S. [149] - 167