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1	2019 "Dig where you stand" 5. Proceedings of the Fifth International Conference on the History of Mathematics Education. ICHME-5. Mathematical reasoning in trigonometric definitions, proofs, and calculations on early 19th century textbooks from Norway and Denmark. p. 111-127.
2	2019 Proceedings of the Eighth European Summer University on History and Epistemology in Mathematics Education. The first Norwegian textbooks in mathematics: A story of independence and controversy. p. 815-839.
3	2012 HPM 2012. The HPM Satellite Meeting of ICME-12. Proceeding book 2. Geometry Textbooks in Norway in the first half of th 19th century. p. 683-692.
4	2011 History and Epistemology in Mathematics Education: Proceedings of the Sixth European Summer University (ESU 6). Bernt Michael Holmoe's textbooks. p. 653-663.