4. Berufliche Anfänge am Radiuminstitut in Wien 1911–1918 (“Chapter 4. Early Career at the Radium Institute in Vienna, 1911–1918” by Christoph Maulbetsch, German language).
17. „Über die Verwandlung von Wasserstoff in Helium“ (“Chapter 17. ‘On the Transformation of Hydrogen into Helium’” by Christoph Maulbetsch, German language).