1. R. L. Sime, Lise Meitner: A Life in Physics, U. California Press (1996), p. 104.
2. The number of β-particles from Radium E
3. Über das Element 93
4. For an English translation, see H. G. Graetzer, D. L. Anderson, The Discovery of Nuclear Fission: A Documentary History, Van Nostrand Reinhold (1971), p. 18.
5. Controversy and Consensus: Nuclear Beta Decay 1911–1934