COWLEY, C. R.; BIDELMAN, W. P.; HUBRIG, S. On the possible presence of promethium in the spectra of HD 101065 (Przybylski's star) and HD 965. Astronomy & Astrophysics. 2004-06, roč. 419, čís. 3, s. 1087–1093. Dostupné online [cit. 2023-06-06]. ISSN0004-6361. doi:10.1051/0004-6361:20035726.
MARINSKY, J. A.; GLENDENIN, L. E.; CORYELL, C. D. The Chemical Identification of Radioisotopes of Neodymium and of Element 61 1. Journal of the American Chemical Society. 1947-11, roč. 69, čís. 11, s. 2781–2785. Dostupné online [cit. 2025-05-24]. ISSN0002-7863. doi:10.1021/ja01203a059. (anglicky)
MARINSKY, J. A.; GLENDENIN, L. E.; CORYELL, C. D. The Chemical Identification of Radioisotopes of Neodymium and of Element 61 1. Journal of the American Chemical Society. 1947-11, roč. 69, čís. 11, s. 2781–2785. Dostupné online [cit. 2025-05-24]. ISSN0002-7863. doi:10.1021/ja01203a059. (anglicky)
COWLEY, C. R.; BIDELMAN, W. P.; HUBRIG, S. On the possible presence of promethium in the spectra of HD 101065 (Przybylski's star) and HD 965. Astronomy & Astrophysics. 2004-06, roč. 419, čís. 3, s. 1087–1093. Dostupné online [cit. 2023-06-06]. ISSN0004-6361. doi:10.1051/0004-6361:20035726.
FLICKER, H.; LOFERSKI, J.J.; ELLEMAN, T.S. Construction of a promethium-147 atomic battery. IEEE Transactions on Electron Devices. 1964-01, roč. 11, čís. 1, s. 2–8. Dostupné online [cit. 2023-06-06]. ISSN0018-9383. doi:10.1109/T-ED.1964.15271.
FLICKER, H.; LOFERSKI, J.J.; ELLEMAN, T.S. Construction of a promethium-147 atomic battery. IEEE Transactions on Electron Devices. 1964-01, roč. 11, čís. 1, s. 2–8. Dostupné online [cit. 2023-06-06]. ISSN0018-9383. doi:10.1109/T-ED.1964.15271.
MARINSKY, J. A.; GLENDENIN, L. E.; CORYELL, C. D. The Chemical Identification of Radioisotopes of Neodymium and of Element 61 1. Journal of the American Chemical Society. 1947-11, roč. 69, čís. 11, s. 2781–2785. Dostupné online [cit. 2025-05-24]. ISSN0002-7863. doi:10.1021/ja01203a059. (anglicky)
COWLEY, C. R.; BIDELMAN, W. P.; HUBRIG, S. On the possible presence of promethium in the spectra of HD 101065 (Przybylski's star) and HD 965. Astronomy & Astrophysics. 2004-06, roč. 419, čís. 3, s. 1087–1093. Dostupné online [cit. 2023-06-06]. ISSN0004-6361. doi:10.1051/0004-6361:20035726.
FLICKER, H.; LOFERSKI, J.J.; ELLEMAN, T.S. Construction of a promethium-147 atomic battery. IEEE Transactions on Electron Devices. 1964-01, roč. 11, čís. 1, s. 2–8. Dostupné online [cit. 2023-06-06]. ISSN0018-9383. doi:10.1109/T-ED.1964.15271.