Reference Label	Details
note unc	The quoted uncertainty appeared to correspond to one std dev. and was multiplied by 2 to come closer to the desired 95% confidence limit
Kristensen 1997a	P. Kristensen, U. V. Pedersen, V. V. Petrunin, T. Andersen, and K. T. Chung, Phys. Rev. A 55, 978-983 (1997) Binding Energy of the Metastable He- Ion