Helge Kragh: ”Warming Up”, On Arthur Eddington's Theory of Everything, s. 2–3. Niels Bohr -instituutti, Kööpenhaminan yliopisto, 2010. Teoksen verkkoversio.
Helge Kragh: ”Constants of Nature”, On Arthur Eddington's Theory of Everything, s. 6. Niels Bohr -instituutti, Kööpenhaminan yliopisto, 2010. Teoksen verkkoversio.
Helge Kragh: ”Cosmo-Physics”, On Arthur Eddington's Theory of Everything, s. 13. Niels Bohr -instituutti, Kööpenhaminan yliopisto, 2010. Teoksen verkkoversio.
Helge Kragh: ”Eddington meets the Dirac Equation”, On Arthur Eddington's Theory of Everything, s. 4–5. Niels Bohr -instituutti, Kööpenhaminan yliopisto, 2010. Teoksen verkkoversio.
A. S. Dyson, A. S. Eddington, C. R. Davidson: A Determination of the Deflection of Light by the Sun's Gravitational Field, from Observations Made at the Solar eclipse of May 29, 1919. Philosophical Transactions of the Royal Society A: Physical, Mathematical and Engineering Sciences, 1920, nro 220, s. 291–333. doi:10.1098/rsta.1920.0009Bibcode:1920RSPTA.220..291D
harvard.edu
adsabs.harvard.edu
A. S. Dyson, A. S. Eddington, C. R. Davidson: A Determination of the Deflection of Light by the Sun's Gravitational Field, from Observations Made at the Solar eclipse of May 29, 1919. Philosophical Transactions of the Royal Society A: Physical, Mathematical and Engineering Sciences, 1920, nro 220, s. 291–333. doi:10.1098/rsta.1920.0009Bibcode:1920RSPTA.220..291D