Reference Label	Details
Hollenstein 2003	U. Hollenstein, R. Seiler, and F. Merkt, J. Phys. B 36, 893-903 (2003) Determination of the Ionization Energy of Krypton by Rydberg-State-Resolved Threshold-Ionization Spectroscopy
Brandi 2002	F. Brandi, W. Hogervorst, and W. Ubachs, J. Phys. B 35, 1071-1084 (2002) High-Resolution Vacuum-Ultraviolet and Ultraviolet Photoionization Spectroscopy of Krypton
Yoon 1994	S. Yoon and W. L. Glab, J. Phys. B 27, 4133-4143 (1994) Rydberg Series of Krypton Excited From the 5p[3/2]1,2 States