with Wittenberger, G. (eds) , 1999, Die Rundbriefe des "Geheimen Komitees", diskord, Tübingen.
, 1993a, Does the structuralist view of theories allow a fresh look at the history of psychology?, in H. Van Rappard, P. Van Strien, L. Mos & W. J. Baker (eds.), Annals of theoretical psychology, Dordrecht, Springer, pp. 247-250.
, 1993b, Preliminary observations on the history and theory of psychology from a structuralist point of view, in H. Van Rappard, P. Van Strien, L. Mos & W. J. Baker (eds.), Annals of theoretical psychology, Dordrecht, Springer, pp. 207-236.