Baetslé, L.H.; De Raedt, Ch. (1997). "Limitations of actinide recycle and fuel cycle consequences: a global analysis Part 1: Global fuel cycle analysis". Nuclear Engineering and Design. 168 (1–3): 191–201. Bibcode:1997NuEnD.168..191B. doi:10.1016/S0029-5493(96)01374-X. ISSN0029-5493.
Milsted, J.; Friedman, A. M.; Stevens, C. M. (1965). "The alpha half-life of berkelium-247; a new long-lived isomer of berkelium-248". Nuclear Physics. 71 (2): 299. Bibcode:1965NucPh..71..299M. doi:10.1016/0029-5582(65)90719-4. "The isotopic analyses disclosed a species of mass 248 in constant abundance in three samples analysed over a period of about 10 months. This was ascribed to an isomer of Bk248 with a half-life greater than 9 [years]. No growth of Cf248 was detected, and a lower limit for the β− half-life can be set at about 104 [years]. No alpha activity attributable to the new isomer has been detected; the alpha half-life is probably greater than 300 [years]."
Claude Degueldre, Richard James Dawson, Vesna Najdanovic-Visak Nuclear fuel cycle, with a liquid ore and fuel: toward renewable energy, Sustainable Energy and Fuels 3 (2019) 1693-1700. https://doi.org/10.1039/C8SE00610E
Baetslé, L.H.; De Raedt, Ch. (1997). "Limitations of actinide recycle and fuel cycle consequences: a global analysis Part 1: Global fuel cycle analysis". Nuclear Engineering and Design. 168 (1–3): 191–201. Bibcode:1997NuEnD.168..191B. doi:10.1016/S0029-5493(96)01374-X. ISSN0029-5493.
Milsted, J.; Friedman, A. M.; Stevens, C. M. (1965). "The alpha half-life of berkelium-247; a new long-lived isomer of berkelium-248". Nuclear Physics. 71 (2): 299. Bibcode:1965NucPh..71..299M. doi:10.1016/0029-5582(65)90719-4. "The isotopic analyses disclosed a species of mass 248 in constant abundance in three samples analysed over a period of about 10 months. This was ascribed to an isomer of Bk248 with a half-life greater than 9 [years]. No growth of Cf248 was detected, and a lower limit for the β− half-life can be set at about 104 [years]. No alpha activity attributable to the new isomer has been detected; the alpha half-life is probably greater than 300 [years]."
Baetslé, L.H.; De Raedt, Ch. (1997). "Limitations of actinide recycle and fuel cycle consequences: a global analysis Part 1: Global fuel cycle analysis". Nuclear Engineering and Design. 168 (1–3): 191–201. Bibcode:1997NuEnD.168..191B. doi:10.1016/S0029-5493(96)01374-X. ISSN0029-5493.