| 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 |
| Eikema 1997 | K. S. E. Eikema, W. Ubachs, W. Vassen, and H. Horgorvorst. Phys. Rev. A 55, 1866 (1997) |