1. Chr.JungnickelandR.McCormmach Intellectual Mastery of Nature vol. 2 (University of Chicago Press Chicago London 1986) pp. 3–17 309–323.
2. L.Pyenson The Young Einstein (Adam Hilger Bristol 1985) pp. 194–214
3. Physical sense in relativity: Max Planck edits the Annalen der Physik, 1906–1918
4. For more biographical information on Max Planck see:J.Heilbron The Dilemmas of an Upright Man (University of California Press Berkeley 1986);A.Hermann Max Planck (Rowohlt‐Verlag Reinbek 1973);D.Hoffmann Max Planck. Die Entstehung der modernen Physik (Verlag C. H. Beck Munich 2008).