Reference Label	Details
Huber 1979	K. P. Huber and G. Herzberg, "Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules", Van Nostrand Reinhold: New York 1979
est unc	estimated uncertainty
Bauschlicher 1989	C. W. Bauschlicher Jr., H. Partridge, and D. Ceperley, Chem. Phys. Lett. 160, 183-188 (1989) The Dissociation Energy of He2+