Janssen, Michel Department Structural Changes in Systems of Knowledge, Max Planck Institute for the History of Science, Max Planck Society;
Duncan, A., & Janssen, M. (2015). The Stark effect in the Bohr-Sommerfeld theory and in Schrödinger's wave mechanics. In F. Aaserud, & H. Kragh (Eds.), One hundred years of the Bohr atom: proceedings from a conference (pp. 217-271). Copenhagen: Det Kongelige Danske Videnskabernes Selskab.
