Article Kragh, Helge; (2003)
Magic Number: A Partial History of the Fine-Structure Constant (/isis/citation/CBB000340518/)

Book Anthony Duncan; Michel Janssen; (2019)
Constructing Quantum Mechanics: Volume 1: The Scaffold: 1900-1923 (/isis/citation/CBB260967807/)

Article Nisio, Sigeko; (1974 (pub. 1975))
Sommerfeld's quantum theory of 1911 (/isis/citation/CBB000025047/)

Article Jentschura, U. D.; Nándori, I.; (2014)
Attempts at a Determination of the Fine-Structure Constant from First Principles: A Brief Historical Overview (/isis/citation/CBB001421684/)

Article Bierhalter, Günter; (1994)
Ist die Sommerfeldsche Feinstruktur-“Konstante” eine statistische Relation? (/isis/citation/CBB000040258/)

Article Schot, Steven H.; (1992)
Eight years of Sommerfeld's radiation condition (/isis/citation/CBB000030704/)

Book Hoffmann, Dieter; (2010)
Max Planck und die moderne Physik (/isis/citation/CBB001024503/)

Article Gearhart, Clayton A.; (2002)
Planck, the Quantum, and the Historians (/isis/citation/CBB000200079/)

Article Alekseev, I. S.; (1981)
K predystorii kvantovoi teorii. (On the prehistory of the quantum theory.) (/isis/citation/CBB000020369/)

Article Büttner, Jochen; Renn, Jürgen; Schemmel, Matthias; (2003)
Exploring the Limits of Classical Physics: Planck, Einstein, and the Structure of a Scientific Revolution (/isis/citation/CBB000340837/)

Book Evans, James; Thorndike, A. S.; (2007)
Quantum Mechanics at the Crossroads: New Perspectives from History, Philosophy and Physics (/isis/citation/CBB001031681/)

Thesis Needell, Allan A.; (1980)
Irreversibility and the failure of classical dynamics: Max Planck's work on the quantum theory, 1900-1915 (/isis/citation/CBB001563704/)

Article Hawes, Joan L.; (1981)
Matter for illumination (/isis/citation/CBB000012781/)

Article Gorham, Geoffrey; (1991)
Planck's Principle and Jeans's conversion (/isis/citation/CBB000043971/)

Book Brown, Brandon R.; (2015)
Planck: Driven by Vision, Broken by War (/isis/citation/CBB001422647/)

Book Pietro Greco; (2020)
Quanti. La straordinaria storia della meccanica quantistica (/isis/citation/CBB247197978/)

Article Milonni, P.W.; Shih, M.-L.; (1991)
Zero-point energy in early quantum theory (/isis/citation/CBB000060964/)

Book (1995)
The foundations of quantum mechanics: Historical analysis and open questions, Lecce, 1993 (/isis/citation/CBB000068646/)

Thesis Seth, Suman; (2003)
Principles and Problems: Constructions of Theoretical Physics in Germany, 1890--1918 (/isis/citation/CBB001561992/)

Article Teichmann, Jürgen; Eckert, Michael; Wolff, Stefan; (2002)
Physicists and Physics in Munich (/isis/citation/CBB000642046/)