Reference Label	Details
est unc	estimated uncertainty
Ivanic 1997	J. Ivanic, G. J. Atchity, and K.s Ruedenberg, J. Chem. Phys. 107, 4307-4317 (1997) Violation of the weak noncrossing rule between totally symmetric closed-shell states in the valence-isoelectronic series O3, S3, SO2, and S2O