1. Bohr, N. (1954). “Rydberg’s Discovery of the Spectral Laws.” In Proceedings of the Rydberg Centennial Conference on Atomic Spectroscopy, edited by Bengt Edlén, pp. 15–21. Acta Universitatis Lundensis, 50. Lund: Gleerup. (Niels Bohr assessed the use of Rydberg’s work for the construction of quantum theories of matter.)
2. Dörries, Matthias (1995). “Heinrich Kayser as Philologist of Physics.” Historical Studies in the Physical Sciences 26: 1–33. (For an evaluation of Heinrich Kayser and Carl Runge.)
3. Hamilton, Paul C. (1993). “Reaching Out: Janne Rydberg’s Struggle for Recognition.” In Center on the Periphery: Historical Aspects of 20th-Century Swedish Physics, edited by Svante Lindqvist, pp. 269–292. Canton, Massachusetts: Science History Publications. (For a discussion of the difficulties faced by Rydberg to obtain official recognition of his work.)
4. Recherches sur la constitution des spectres d’émission des éléments chimiques;JR Rydberg,1890
5. — (1890). “On the Structure of the Line-Spectra of the Chemical Elements.” Philosophical Magazine, 5th ser., 29: 331–337.