Hrovat, D. A., Hou, G., Chen, B., Wang, X., & Borden, W. T. (2016). Negative ion photoelectron spectroscopy confirms the prediction that D(3h) carbon trioxide (CO(3)) has a singlet ground state. Chem Sci.

Hrovat, David A., Gao-Lei Hou, Bo Chen, Xue-Bin Wang, و Weston Thatcher Borden. "Negative Ion Photoelectron Spectroscopy Confirms the Prediction That D(3h) Carbon Trioxide (CO(3)) Has a Singlet Ground State." Chem Sci 2016.

Hrovat, David A., et al. "Negative Ion Photoelectron Spectroscopy Confirms the Prediction That D(3h) Carbon Trioxide (CO(3)) Has a Singlet Ground State." Chem Sci 2016.