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. DOI10.1051/0004-6361:20035726.
doi.org
dx.doi.org
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. DOI10.1051/0004-6361:20035726.
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. DOI10.1109/T-ED.1964.15271.
ieee.org
ieeexplore.ieee.org
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. DOI10.1109/T-ED.1964.15271.
web.archive.org
Archivovaná kopie. www.nndc.bnl.gov [online]. [cit. 2018-03-20]. Dostupné v archivu pořízeném dne 2018-10-10.
worldcat.org
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. DOI10.1051/0004-6361:20035726.
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. DOI10.1109/T-ED.1964.15271.