A:6

Philosophy: Accident, Epiphenomenon or Contributory Cause of the Changing Trends of Mathematics. A Sketch of the Development from the Twelfth through the Sixteenth Century. (Filosofi og Videnskabsteori på Roskilde Universitetscenter. 1. Række: Enkeltpublikationer 1987 Nr. 1). Roskilde: Roskilde Universititetscenter.  Included in A:10.

G:42

B:18

“Jordanus de Nemore: A Case Study on 13th Century Mathematical Innovation and Failure in Cultural Context”. Philosophica 42 (Gent, 1988), 43–77. Abridged version of B:17 provided with an extra chapter. Included in A:10. Manuscript.

G:47

“Mu^camalat and otherwise in the Liber mahamaleth”. Contribution to “Le 11^ième Colloque Maghrébin sur l'histoire des mathématiques arabes”, École Normale Supérieure Kouba – Alger, 26, 27, 28 octobre 2013. Roskilde University, 3.11.2013.

C:49

D:15

C:66

E:69

[Review of Menso Folkerts, Essays on Early Medieval Mathematics. The Latin Tradition. (Variorum). Aldershot, Hampshire, & Burlington: Ashgate, 2003]. Centaurus 49 (2007), 255–256. Available at www.blackwell-synergy.com.

E:80

Review of  Menso Folkerts, The Development of Mathematics in Medieval Europe: The Arabs, Euclid,
Regiomontanus. (Variorum Collected Studies Series CS811). Aldershot: Ashgate, 2006. Aestimatio 4 (2007), 122–141..

E:44

[Review of Hubert L. L. Busard (ed.), A Thirteenth-Century Adaptation of Robert of Chester's Version of Euclid's «Elements». 2 vols. (Algorismus. Studien zur Geschichte der Mathematik und der Naturwissenschaften, 17). München: Institut für Geschichte der Naturwissenschaften, 1996]. Zentralblatt für Mathematik und ihre Grenzgebiete 863 (1997), #01026.

E:68

[Review af Hubert L. L. Busard (ed.), Johannes de Tinemue's Redaction of Euclid's Elements, the So-Called Adelard III Version. 2 vols. (Boethius, 45,1–2). Stuttgart: Franz Steiner, 2001]. Centaurus 46 (2004), 173–175. Manuscript. The definitive version is available at www.blackwell-synergy.com.

E:79

Review of H. L. L. Busard, Campanus of Novara and Euclid's Elements. 2 vols. (Boethius, 51, 1–2). Stuttgart: Franz Steiner, 2005. Centaurus 48 (2006), 329–330.

E:25

[Review of H. L. L. Busard (ed.), Jordanus de Nemore, De elementis arithmetice artis. A Medieval Treatise on Number Theory. Stuttgart: Franz Steiner, 1991]. Centaurus 35 (1992), 70–72.Manuscript. The definitive version is available at www.blackwell-synergy.com.

E:52

[Review of H. L. L. Busard (ed.), Johannes de Muris, De arte mensurandi. A Geometrical Handbook of the Fourteenth Century. (Boethius, 41). Stuttgart: Franz Steiner, 1998]. Zentralblatt für Mathematik und ihre Grenzgebiete 0913.01011.

E:14

[Review of M. Clagett. Archimedes in the Middle Ages. Volume V. Quasi-Archimedean Geometry in the Thirteenth Century. (Memoirs of the American Philosophical Society, 157 A+B). Philadelphia: The American Philosophical Society, 1984]. Annals of Science 46 (1989), 107–109. Manuscript.

E:22

[Review of Charles Burnett (ed.), Adelard of Bath. An English Scientist and Arabist of the Twelfth Century. (Warburg Institute Surveys and Texts, XIV). London: The Warburg Institute, 1987]. Centaurus 33 (1991), 256–258. Manuscript. The definitive version is available at www.blackwell-synergy.com.

E:30

[Review of de Siebenthal, Les Mathématiques dans l'Occident médiéval. Lausanne: Éditions Terre Haute, 1993]. Mathematical Reviews MR1218621 (94k:01004).

E:45

[Review of Brigitte Englisch, Die Artes liberales im frühen Mittelalter (5.–9. Jh.). Das Quadrivium und der Komputus als Indikatoren für Kontinuität und Erneuerung der exakten Wissenschaften zwischen Antike und Mittelalter. (Sudhoffs Archiv, Beiheft 33). Stuttgart: Franz Steiner, 1994]. Mathematical Reviews MR1435961 (98a:01006).

E:65

[Review of John J. Contreni & Santa Casciani (eds), Words, Image, Number: Communication in the Middle Ages. (Micrologus Library, 8). Firenze: SISMEL – Edizioni del Galluzzo, 2002]. Mathematical Reviews 2004m (2004), #01001.

E:33

[Review of B. Englisch, Die Artes liberales im frühen Mittelalter (5.–9. Jh.). Das Quadrivium und der Komputus als Indikatoren für Kontinuität und Erneuerung der exakten Wissenschaften zwischen Antike und Mittelalter. Stuttgart: Franz Steiner, 1994]. Centaurus 37 (1994; publ. 1995), 355–356. Manuscript. The definitive version is available at www.blackwell-synergy.com.

E:35

[Review of P. L. Butzer & D. Lohrman (eds), Science in Western and Eastern Civilization in Carolingian Times. Basel: Birkhäuser, 1993]. Mathematical Reviews MR1297546 (95m:01004).

E:57

[Review of Menso Folkerts (ed.), Die älteste lateinische Schrift über das indische Rechnen nach al- al-Hwārizmī. (Bayer. Akad. d. Wiss. Phil.-hist. Kl. Abh. NF, 113) München: Verlag d. bayerischen Akademie der Wissenschaften, 1997.] Centaurus 42 (2000), 246–247. Manuscript. The definitive version is available at www.blackwell-synergy.com.

E:63

[Review of David A. King, The Ciphers of the Monks. A Forgotten Number-Notation of the Middle Ages. (Boethius, 44). Stuttgart: Franz Steiner, 2001].  Annals of Science 65 (2008), 306–308. Manuscript.

E:67

[Review of Ann E. Moyer, The Philosophers' Game. Rithmomachia in Medieval and Renaissance Europe. With an Edition of Ralph Lever and William Fulke, The Most Noble, Auncient, and Learned Playe (1563). Ann Arbor: University of Michigan Press, 2001] Annals of Science 61 (2004), 504–505. Manuscript.

E:84

Review of Barnabas B. Hughes (ed., trans.), Fibonacci's De practica geometrie. New York: Springer, 2008. Historia Mathematica online. DOI: 10.1016/j.hm.2008.06.005. Manuscript.

E:96

E:104

E:105