1. P. H. Krupenie , in The Band Spectrum of Carbon Monoxide, Natl. Std. Ref. Data Sys., Natl. Bur. Std., US, 1966, vol. 5.
2. W. H. B. Cameron , in The Production of some Spectra of Carbon, Oxygen and Nitrogen in the Presence of Neon, Philos. Mag., 1926, vol. 1, p. 405.
3. Quenching and radiation rates of CO (a 3Π)
4. Dissociation of CO2by Electron Impact with the Formation of Metastable CO(a 3Π) and O(5S)
5. CO(a 3Π), Its Production, Detection, Deactivation, and Radiative Lifetime