Hoffmann, Dieter Department Structural Changes in Systems of Knowledge, Max Planck Institute for the History of Science, Max Planck Society;
Hoffmann, D. (2001). [Entry] 'Planck, Max'. In H. K. B. A. der der Wissenschaften (Ed.), Neue Deutsche Biographie. Bd. 20 (pp. 497-500). Berlin: Duncker & Humblot.