NIST Energy Levels and Wavelengths Bibliographic Reference # 3577
New Energy Levels in Au II, Hg III, Tl IV, Pb V and Bi VI,
J. E. Mack and M. Fromer,
Phys. Rev. 48, 357–366 (1935)
DOI:
Get all bibliography on Bi VI ionization energy (new window)