F:5 Institutions, Professions, and Ideas. An Approach to the Theory of the Humanities through their History and Institutional Settings and their Implicit Anthropologies. (Filosofi og Videnskabsteori på Roskilde Universitetscenter. 1. Række: Enkeltpublikationer, 1993 Nr. 1). Roskilde: Roskilde Universitetscenter, Institut for Sprog og Kultur, 1993.
 
F:6 The Art of Knowing: An Essay on Epistemology in Practice. (Filosofi og Videnskabsteori på Roskilde Universitetscenter. 1. Række: Enkeltpublikationer, 1995 Nr. 1). Roskilde: Roskilde Universitetscenter, Institut for Sprog og Kultur, 1995.
 
F:7 As Regards the Humanities ...: An Approach to their Theory through History and Philosophy. Filosofi og Videnskabsteori på Roskilde Universitetscenter. 3. Række: Preprints og Reprints 1995 Nr. 1.Revised version of F:5 and F:6 as one volume. Published with revisions as A:14.
 

G:28

 

 “Generosity: No Doubt, but at Times Excessive and Delusive” Filosofi og Videnskabsteori på Roskilde Universitetscenter. 3. Række: Preprints og Reprints 2007 Nr. 6.
 

C:61

 

 “From the Practice of Explanation to the Ideology of Demonstration: An Informal Essay”, pp. 27–46 in G. Schubring (ed.), Interfaces between Mathematical Practices and Mathematical Education. Cham: Springer, 2018.
 

C:63

 

 “What Is a Number? What Is a Concept? Who Has a Number Concept?”, pp. 23-27 in Jürgen Renn and Matthias Schemmel (eds.), Culture and Cognition. Essays in Honor of Peter Damerow. Berlin: Edition Open Access, 2019.
 

E:5

[Review of Sal Restivo, The Social Relations of Physics, Mysticism, and Mathematics. Dordrecht etc.: D. Reidel, 1983]. Annals of Science 41 (1984), 599–601.
 

E:77

[Review of Jean-Louis Gardies, Du mode d'existence des objets de la mathématique. (Problèmes et controverses). Paris: J. Vrin, 2004]. Zentralblatt für Mathematik und ihre Grenzgebiete Zbl 1086.01007 .