1. Jürgen Ehlers and Engelbert Schücking, “‘Aber Jordan war der erste’: Zur Erinnerung an Pascual Jordan (1902–1980),” Physik Journal 1 (2002), 71–74.
2. Jordan’s contributions to quantum mechanics are amply documented in the rich historical literature on the subject. See, for example, Jagdish Mehra and Helmut Rechenberg, The Historical Development of Quantum Theory, vol. 6, part 1 (New York: Springer-Verlag, 2000) and Bert Schroer, “Pascual Jordan, Biographical Notes, his Contributions to Quantum Mechanics and his Role as a Protagonist of Quantum Field Theory,” in Pascual Jordan (1902–1980). Mainzer Symposium zum 100. Geburtstag, preprint no. 329 (Berlin: Max Planck Institute for the History of Science, 2007), 47–68. Available online from http://www.mpiwg-berlin.mpg.de/en/resources/preprints.html , accessed December 5, 2014.
3. Silvan S. Schweber, QED and the Men Who Made It: Dyson, Feynman, Schwinger and Tomonaga (Princeton: Princeton University Press, 1994), 5–11.
4. For a full biography of Jordan’s writings, see Wolf D. Beiglböck, “Pascual Jordan: Schriftenverzeichnis,” in Pascual Jordan (ref. 2), 175–206.
5. Richard H. Beyler, “Targeting the Organism: The Scientific and Cultural Context of Pascual Jordan’s Quantum Biology, 1932–1947,” Isis 87 (1996), 248–273.