Radvanyi, Pierre (2011). „Physics and Radioactivity after the Discovery of Polonium and Radium”(electronic). Chemistry International (на језику: енглески). online: iupac.org International Union of Pure and Applied Chemistry. 33 (1). Приступљено 13. 6. 2021 — преко Microsoft Bing. „"..The scintillation method, developed by W. Crookes, J. Elster, and H. Geitel, allowed just that. However, Rutherford wanted to count them by an "electric" method and constructs, together with his young German co-worker Hans Geiger, the first particle counter in 1908. In order to ascertain the properties of the alpha-particles, he asks Geiger and an English-New Zealand student, E. Marsden, to study their scattering through thin metallic foils....”CS1 одржавање: Датум и година (веза)CS1 одржавање: Формат датума (веза)