1. Irène Curie and F. Joliot, “Un nouveau type de radioactivité,” Comptes rendus hebdomadaries des séances de l’Académie des Sciences 198 (1934), 254-256; reprinted in Frédèric et Irène Joliot-Curie, Œuvres Scientifiques Complètes. Ouvrage publié avec le concours du Centre National de la Recherche Scientifique (Paris: Presses Universitaires de France, 1961), pp. 515-516.
2. F. Joliot and I. Curie, “Artificial Production of a New Kind of Radio-Element,” Nature 133 (1934), 201-202; Œuvres Scientifiques Complètes (ref. 1), pp. 520-521.
3. “Artificial Radioactivity Produced for the First Time,” The Science News Letter (February 10, 1934), p. 83.
4. Quoted in ibid.
5. E. Fermi, “Radioattività indotta da bombardamento di neutroni.–I,” La Ricerca Scientifica 5 (1934), 283; reprinted in Collected Papers (Note e Memorie). Vol I. Italy 1921-1938 (Chicago: University of Chicago Press and Roma: Accademia Nazionale dei Lincei, 1962), pp. 645-646; translated as “Radioactivity Induced by Neutron Bombardment.–I,” in Collected Papers, pp. 674-675.