• ''Mechanistic images in geometric form: Heinrich Hertz's principles of mechanics'', Oxford University Press 2005 •
The Prehistory of the Theory of Distributions, Studies in the History of Mathematics and the Physical Sciences, Volume 7, Springer Verlag 1982; •
Joseph Liouville 1809–1882. Master of pure and applied mathematics, Springer Verlag 1990 • ''Heaviside's operational calculus and the attempts to rigorise it'', Archive for History of Exact Sciences, Volume 21, 1979, pp. 161–200 (See
Oliver Heaviside.) • "Euler's vision of a general partial differential calculus for a generalized kind of function." Mathematics Magazine 56, no. 5 (1983): 299–306 • "Sturm and Liouville's work on ordinary linear differential equations. The emergence of Sturm-Liouville theory." Archive for History of Exact Sciences 29, no. 4 (1984): 309–376 • with Henk Bos and
Kirsti Andersen:
Træk af den matematiske analyses historie: En antologi af kilder og sekundær litteratur, Center for Vidensskabstudier, Aarhus University, 1987 • with H. Bos and K. Andersen:
Træk af den ikke-Euklidiske geometris historie, University of Aarhus, Center for Vidensska Studies, 1997 •
Interactions between mechanics and differential geometry in the 19th century, Archive for History of Exact Sciences, Vol. 49, 1995, pp. 1–72. • "Chapter 6. The foundation of analysis in the 19th century" by Jesper Lützen in
A History of Analysis edited by Hans Niels Jahnke, American Mathematical Society/London Mathematical Society, 2003, 155–195; translated from the original German of
Geschichte der Analysis, Spektrum Akademische Verlag, 1999. ==References==