A:2

Matematikundervisningen og samfundet. Virum: MATEMATIK, n.d. [1980].
 

E:59

[Review of Danny Bernard Martin, Mathematics Success and Failure among African-American Youth. The Roles of Sociohistorical Context, Community Forces, School Influence, and Individual Agency. (Studies in Mathematical Thinking and Learning). Mahwah, N.J., & London: Lawrence Erlbaum, 2000]. Zentralblatt für Mathematik und ihre Grenzgebiete 0961.00006.
 

E:31

[Review of L. Streefland (ed.), The Legacy of Hans Freudenthal. Dordrecht etc.: Kluwer, 1993. [Identical with Educational Studies in Mathematics 25:1–2 (1993)]. Zentralblatt für Mathematik und ihre Grenzgebiete 0792.01035.
 

B:2

with Else Høyrup. “Matematikundervisning – hvorfor?” Matematik 1:3 (1973), 19–24; 1:4 (1973), 20–26.

B:3

“Matematikundervisning: Reformer, formål og bivirkninger”. Dansk Pædagogisk Tidsskrift 22 (1974), 345–363.