1. The Band Spectrum of Carbon Monoxide;Krupenie,1966
2. Spectroscopic Data Relative to Diatomic Molecules;Rosen,1970
3. Molecular Spectra and Molecular Structure. Vol. IV. Constants of Diatomic Molecules;Huber,1979
4. K. P. Huber, and, G. Herzberg, Russian translation, Konstanty Dvuhatomnych Molekul, Mir, Moscow, 1984.
5. The comet-tail (A-X) system of CO(+) - Precise molecular constants of its 2Sigma(+), A 2 Pii, and B 2Sigma(+) states