structure fine

[1985] The Fine Structure of Hydrogen and the Gross Structure of the Physics Community, 1916-26 ; Helge Kragh ; Historical Studies in the Physical Sciences 15 (1985) p. 67 [lien]
[2014] The fine structure of Hydrogen and Hydrogen-like lines ; A. Sommerfeld ; European Journal of Physics H 39 (2014) p. 179 [lien]