These references will appear in the article, but this list appears only on this page.
↑Lavrukhina၊ Avgusta Konstantinovna; Pozdnyakov၊ Aleksandr Aleksandrovich (1970)။ Analytical Chemistry of Technetium, Promethium, Astatine, and Francium။ Translated by R. Kondor။ Ann Arbor–Humphrey Science Publishers။ p.269။ ISBN978-0-250-39923-9။
↑ISOLDE Collaboration, J. Phys. B 23, 3511 (1990) (PDF online)