Vintage Vision: Brug af object detection i historiske fotografier med fokus på kvindepar (2026). In: Fund og Forskning. With Mette Kia Krabbe Meyer and Laura Søvsø Thomasen.
On the importance of visuo-spatial thinking for research mathematicians (2025). In: Canadian Journal of Experimental Psychology / Revue canadienne de psychologie expérimentale. With Hester Breman, Renee S. Hoekzema, Mikkel Willum Johansen and Rainer Goebel.
Algoritmer og ansvar: De datalogiske fags videnskabsteori (2025). With Mikkel Willum Johansen.
A Magazine of All Perfection: A Case Study of Mathematics in the Early Modern Satire Histrio-Mastix (2024). In: Convergence. With Laura Søvsø Thomasen.
What is History of Mathematics to 21st-Century Mathematicians?: Insights from Digital History and Philosophy of Mathematics (2024). In: Mastering the History of Pure and Applied Mathematics.
Is Experimental Mathematics Really Experimental? (2024). In: Is {Experimental Mathematics} Really Experimental?.
What is an experiment in mathematical practice?: New evidence from mining the Mathematical Reviews (2024). In: Synthese. With Sophie Kjeldberg Mathiasen and Mikkel Willum Johansen.
Mathematicians and visuo-spatial thinking (2024). With Hester Breman, Renee Hoekzema, Johansen, Mikkel Willum and Rainer Goebel.
Epistemic roles of diagrams in short proofs: 13th International Conference, Diagrams 2022, Rome, Italy, September 14--16, 2022, Proceedings (2022). In: Epistemic roles of diagrams in short proofs. With Mikkel Willum Johansen.
Extending Ourselves?: On the Concept and Future of Digital Humanities (2022). In: SPSP Newsletter. With Charles Pence.
Fagligt-kritisk dannelse og matematiske modeller (2022). In: Matematik og Videnskab.
The Central/Executive Committee Members: People, Events, and Challenges in Mathematics Education (2022). In: The Central/Executive Committee Members. With Masami Isoda, Man Keung Siu, Livia Giacardi, Jeremy Kilpatrick, Fulvia Furinghetti, Gert Schubring, Giorgio T. Bagni, Sébastien Gauthier, Catherine Goldstein, Michela Malpangotto, Jaime Carvalho e Silva, Margherita Barile, {\'{E}}ric Barbazo, Harm Jan Smid, Sten Kaijser, Adrian Rice, Hél{\`{e}}ne Gispert, Milosav M. Marjanovi{\'{c}}, Stevo Todor{\v{c}}evi{\'{c}}, Osmo Pekonen, Reinhard Siegmund-Schultze, Mich{\`{e}}le Artigue, Aline Robert, Ewa Lakoma and László Surányi.
The Role of Testimony in Mathematics (2021). In: Synthese. With Line Edslev Andersen and Hanne Andersen.
Adapting practice-based philosophy of science to teaching of science students (2021). In: European Journal for Philosophy of Science. With Sara Green, Hanne Andersen, Kristian Danielsen, Claus Emmeche, Christian Joas, Mikkel Willum Johansen, Caio Nagayoshi and Joeri Witteveen.
Mathematicians Writing for Mathematicians (2021). In: Synthese. With Line Edslev Andersen and Mikkel Willum Johansen.
Augmenting the human mathematician (2021). With Hester Breman, Renee Hoekzema and Mikkel Willum Johansen.
Beyond counting: Measuring diagram intensity in mathematical research papers during the past 25 years (2021). In: Diagrammatic Representation and Inference.
The Norwegian Hosts: The Newcomer with Historical Traditions (2020). In: Meeting under the Integral Sign?.
Algorismus i Hauksbók: Hvordan de hindu-arabiske tal blev introduceret i Island (2020). With Emilie Gertz and Kristian Danielsen.
Meeting under the Integral Sign?: The Oslo Congress of Mathematicians on the Eve of the Second World War (2020). With Christopher D. Hollings and Reinhard Siegmund-Schultze.
Counting mathematical diagrams with machine learning (2020). With Mikkel Willum Johansen.
StenoMusen runder et blødt hjørne (2020). In: StenoMusen. With Laura Søvsø Thomasen.
Midt i en talfyldt corona-tid: Statistisk dannelse, videnskabsteori og historie (2020). In: MATEMATIK. With Kristian Danielsen and Mikkel Willum Johansen.
Teaching reader engagement as an aspect of proof (2019). In: ZDM Mathematics Education. With Kristian Danielsen and Line Edslev Andersen.
Observationer, eksperimenter og iagttagelser i videnskab og undervisning (2019). In: MONA: Matematik- og Naturfagsdidaktik. With Laura Søvsø Thomasen.
Mapping Social Aspects of Mathematical Knowledge Production (2018). With Line Edslev Andersen.
Videnskabsteori relevant for matematikere?: Hvordan man kan få epistemologi og etik til at mødes (2018). In: Fagets videnskabsteori. With Mikkel Willum Johansen.
Facilitating source-centered history of mathematics in Danish upper-secondary mathematics education (2018). In: Mathematics, Education and History. With Kristian Danielsen and Emilie Gertz.
René Descartes og hans Geometri: Med oversættelse af 1. bind (2018).
Descartes' Geometri i matematikhistorisk belysning: Med oversættelse af 1. bind (2018). In: Descartes' {Geometri} i matematikhistorisk belysning.
Snows spøgelseskort, Halleys livsrenter og Cauchys integraler: Tre gode matematikhistorier (2018).
Indledning: Materialer til kildecentreret matematikhistorie i gymnasiet: Tre gode matematikhistorier (2018). In: Indledning: Materialer til kildecentreret matematikhistorie i gymnasiet. With Kristian Danielsen.
At tegne landet: Kortlægningens bidrag til den nationale landskabsforståelse i det lange 1800-tal (2018). In: Jordforbindelser.
Modelvalg og ansvar (2018). In: Aktuel Naturvidenskab. With Mikkel Willum Johansen.
Big datas Titanic? (2018). In: Aktuel Naturvidenskab. With Mikkel Willum Johansen.
Når forskellige fagligheder brydes og ny forskning opstår (2018). In: Aktuel Naturvidenskab. With Mikkel Willum Johansen.
Historien om logistisk vækst (2018).
Matematisk dannelse for det 21. århundrede (2018). In: Tidsskriftet MATEMATIK. With Mikkel Willum Johansen.
Kortlægning af filosofikum i andre lande (2018). With Hanne Andersen.
Termodynamikkens fjerde hovedlov (2018). In: Aktuel Naturvidenskab. With Mikkel Willum Johansen.
Shaping Mathematics as a Tool: The Search for a Mathematical Model for Quasi-crystals (2017). In: Mathematics as a Tool.
Tal (2017).
Studying appropriations of past lives: Using metabiographical approaches in the history of mathematics (2017). In: BSHM Bulletin: Journal of the British Society for the History of Mathematics.
Kildecentreret matematikhistorie: Herons formel (2017). In: LMFK-bladet. With Kristian Danielsen.
Når en trekant ikke bare er en trekant: Matematik og litteratur i det lange 1800-tal (2017). In: Passage.
Tal er som bikinier: Derfor behøver vi taldannelse (2017). In: RetorikMagasinet.
History of the Novembertagungs on History of Mathematics (2017).
Er man for høj, hvis man måler for meget? (2017).
Montucla Prize 2017 (2017). In: Historia Mathematica.
The Irony of Romantic Mathematics: Bridging the Historiographies of Literature and Mathematics (2016). In: Configurations. With Laura Søvsø Thomasen.
The End of Proof?: The integration of different mathematical cultures as experimental mathematics comes of age (2016). In: Mathematical Cultures.
Historiography of Mathematics in the 19th and 20th Centuries (2016).
Appropriating role models for the mathematical profession: Biographies in the American Mathematical Monthly around 1900 (2016). In: Appropriating role models for the mathematical profession.
Herons formel: Hvordan en aleksandriner fik sat mål på alle slags trekanter (2016). With Kristian Danielsen.
Introductory remarks (2016). In: Historiography of Mathematics in the 19th and 20th Centuries. With Volker R. Remmert and Martina R. Schneider.
70 --- et fuldt liv eller fuld af liv? (2016). In: Steno Musen.
Kildecentreret matematikhistorie: Reportage fra et forløb og en konference (2016). In: LMFK-bladet. With Jeanette M. Axelsen and Kristian Danielsen.
Herons formel i matematikhistorisk lys (2016).
Maximal partial Latin cubes (2015). In: Electronic Journal of Combinatorics. With Thomas Britz and Nicholas J. Cavenagh.
Formal proof and exploratory experimentation: A Lakatosian view on the interplay between examples and deductive proof practices in upper-secondary school (2015). With Morten Misfeldt and Kristian Danielsen.
Danske matematikeres hjælp til flygtninge fra nazismen (2015). In: Nazismen, universiteterne og videnskaben i Danmark.
Using authentic sources in teaching logistic growth: A narrative design perspective (2015). With Kristian Danielsen.
Confluences of Agendas: Emigrant Mathematicians in Transit in Denmark, 1933--1945 (2014). In: Historia Mathematica.
Vækst i nationens tjeneste: Hvordan Verhulst fik beskrevet logistisk vækst (2014). With Kristian Danielsen.
Invitation til matematikkens videnskabsteori (2014). With Mikkel Willum Johansen.
Matematik under nazismen (2014). In: Weekendavisen.
All in: Gambling i litteraturen fra Lessing til finanskrisen (2014). In: Passage: Tidsskrift for litteratur og kritik. With Laura Søvsø Thomasen.
Proof by picture: A selection of nice picture proofs (2014). In: Parabola. With Thomas Britz and Adam Mammoliti.
Autentisk og relevant matematikhistorie (2014). In: LMFK-bladet. With Kristian Danielsen.
LEGO proof: A LEGO proof of the identity $1^2 + 2^2 + \ldots + n^2 = \frac16 n(n+1)(2n+1)$ (2014). With Thomas Britz.
Review: Campe2012a (2014). In: British Journal for the History of Science. With Laura Søvsø Thomasen.
Cultivating the Herb Garden of Scandinavian Mathematics: Congresses of Scandinavian Mathematicians, 1909--1925 (2013). In: Centaurus. With Laura E. Turner.
What's Abelian about abelian groups? (2013). In: BSHM Bulletin: Journal of the British Society for the History of Mathematics.
Er det matematiske bevis ved at dø ud? (2013). In: Fremtiden.
Gennem kaninhullet: Hvordan et menneskeskabt monster medvirkede til at matematikken blev moderne (2013). In: Matematiske mysterier.
Problem oriented project work in history of mathematics: Report from a PhD summer course (2013). In: BSHM Bulletin: Journal of the British Society for the History of Mathematics. With Tinne Hoff Kjeldsen.
Stenomusen runder de 60 numre (2013). In: StenoMusen.
En dialog mellem matematikkens historie og videnskabsteori (2013). In: LMFK-bladet.
Reading Mittag-Leffler's biography of Abel as an act of mathematical self-fashioning (2012). In: The History of the History of Mathematics.
Making philosophy of science relevant for science students (2012).
Matematik på det store lærred: Stereotyper om matematik og matematikere eksemplificeret ved tre nyere amerikanske film (2011). In: Fra laboratoriet til det store lærred.
At begribe det ubegribelige: Matematikkens antikke verden (2011). In: Antikkens Verden.
Confluences of Agendas: German Refugees and Mathematics in Denmark, 1933--1945 (2011). In: Oberwolfach Reports.
Exploratory experimentation in experimental mathematics: A glimpse at the PSLQ algorithm (2010). In: PhiMSAMP.
Throwing Some Light on the Vast Darkness that is Analysis: Niels Henrik Abel's Critical Revision and the Concept of Absolute Convergence (2010). In: Centaurus.
Introduction: In honour of Kirsti Andersen (2010). In: Centaurus. With Jesper Lützen.
Tusind Engle på et Knappenålshoved: Matematikken i Middelalderen (2010). In: Middelalderens Verden.
Experimental mathematics in the 1990s: A second loss of certainty? (2010). In: Oberwolfach reports.
Relations between mathematics and theology: Theological aspects of the notion of infinity in the history of mathematics (2010). In: God --- a Mathematician?.
$50 = 2\frac12 \times 20 = L = 5^2 + 5^2 = 1^2 + 7^2 = \ldots$ (2010). In: StenoMusen.
Review: Ebbinghaus2007a (2010). In: Zentralblatt MATH.
Representations as means and ends: Representability and habituation in mathematical analysis during the first part of the nineteenth century (2009). In: New Perspectives on Mathematical Practices.
Denne sætning kan ikke bevises: Da matematikken blev moderne (2009). In: {Denne sætning kan ikke bevises}.
Vedkommende videnskabsteori (2009). In: Aktuel Naturvidenskab. With Hanne Andersen, Louis Klostergaard, Henrik Knudsen, Helge Kragh, Keld Nielsen and Kurt Møller Pedersen.
23rd International Congress of the IUPHS (2009). In: Viewpoint: Newsletter of the British Society for the History of Science.
For hele Norges skyld: Et causeri om Abel og Darwin (2009).
Review: Hawkins2008a (2009). In: Zentralblatt MATH.
Aksel Frederik Andersen (1891--1972) (2008). In: The First Century of the International Commission on Mathematical Instruction (1908--2008).
Poul Heegaard (1871--1948) (2008). In: The First Century of the International Commission on Mathematical Instruction (1908--2008).
Romantikkens ligninger --- matematikkens genier: Natur, menneske, samfund, kunst og kultur (2008). In: Romantikkens ligninger --- matematikkens genier.
En matematisk student krydser sit spor: Tværfaglighed på ÅSG, 1998--2008 (2008). In: 50 Århus Statsgymnasium.
Review: Lumiste2005a (2008). In: Zentralblatt MATH.
Matematikhistorie som mål eller middel?: Matematikhistorie til brug i gymnasiets matematikundervisning (2008). In: MONA.
Et helt liv --- i og for matematikken: Review (2008). In: Historisk tidsskrift.
Abel, Niels Henrik (2007). In: New Dictionary of Scientific Biography.
Longomontanus og Descartes: Et Møde i København 1631 (2007). In: Meddelelser fra Ole Rømers Venner. With Helge S. Kragh.
The Higher Weight Enumerators of the Doubly-Even, Self-Dual $[48,24,12]$ Code (2007). In: IEEE Transactions on Information Theory. With Dieter Britz, Thomas Britz and Keisuke Shiromoto.
Longomontanus og cirklens kvadratur: Talmystik, matematik og kontrovers (2007). In: Normat. With Helge S. Kragh.
An Odd Couple: Descartes and Longomontanus. A Contribution to Cartesianism in Seventeenth-Century Denmark (2007). In: Ideas in History. With Helge S. Kragh.
Ti gange fire er fyrre (2007). In: StenoMusen.
Review: Parshall2002a (2007). In: Centaurus.
Review: Oliveri2006a (2007). In: Zentralblatt MATH.
Matematik og statistik (2006). In: Lys over Landet, 1850--1920.
Matematik, statistik og datalogi (2006). In: Viden uden grænser, 1920--1970.
Louis Olivier: A mathematician only known through his publications in Crelle's Journal during the 1820s (2006). In: Centaurus.
Niels Henrik Abel's Political and Professional Legacy in Norway (2006). In: Perspectives on Scandinavian Science in the Early Twentieth Century.
En udstrakt broderlig hånd: Skandinaviske matematikerkongresser indtil slutningen af 1. verdenskrig (2006). In: Normat.
Perspectives on Scandinavian Science in the Early Twentieth Century: An Introduction (2006). In: Perspectives on Scandinavian Science in the Early Twentieth Century. With Reinhard Siegmund-Schultze.
Review: Laudal2004a (2006). In: Centaurus.
Review: Houzel2004a (2006). In: Zentralblatt MATH.
Review: Schubring2005a (2006). In: Zentralblatt MATH.
Review: Tent2006a (2006). In: Zentralblatt MATH.
Eksakte videnskaber --- mere eller mindre: De matematiske videnskaber (2005). In: Natur, Nytte og Ånd, 1730--1850.
Exceptions and counterexamples: Understanding Abel's comment on Cauchy's Theorem (2005). In: Historia Mathematica.
Matematik i det offentlige satiriske rum for hundrede år siden (2005). In: Matilde: Nyhedsbrev for Dansk Matematisk Forening.
Review: Branner1999a,Lutzen2001b (2005). In: Centaurus.
Habituation and representation of elliptic functions in Abel's mathematics (2004). In: Oberwolfach Reports.
Review: HeydeSeneta2001a (2004). In: Centaurus.
Fra mørsere og muddermaskiner til Den Mægtige: Videnskabernes Selskabs prisopgaver i matematik 1768--1866 (2003). In: Matilde: Nyhedsbrev for Dansk Matematisk Forening.
Professionalisation \& Internationalisation of Danish Mathematics 1850--1920 (2003).
Abel and his mathematics in contexts (2002). In: NTM: International Journal of History and Ethics of Natural Sciences, Technology and Medicine.
The Mathematics of Niels Henrik Abel: Continuation and New Approaches in Mathematics During the 1820s (2002).
Review: SiegmundSchultze2001a (2002). In: Centaurus. With Anita Kildebæk Nielsen.
Niels Henrik Abel: Transformation and continuity of mathematics in the 1820s (2001).
Theorems with exceptions and the use of proof (1999).
Matematikken i starten af 1800-tallet: Niels Henrik Abel i en matematisk brydningstid (1999).
Niels Henrik Abel and the theory of equations (1999).
Kædelinjen (1996).
Elementær kompleks funktionsteori hos Weierstrass: Et studie i resultater og metode (1995).
Johann Bernoullis løsning af Kædelinjeproblemet (1992).