| Reference Label | Details |
|---|---|
| Huber 1979 | K. P. Huber and G. Herzberg, "Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules", Van Nostrand Reinhold: New York 1979 |
| est unc | estimated uncertainty |
| Dhumwad 1981 | R. K. Dhumwad, A. B. Patwardhan, V. T. Kulkarni, and M. I. Savadatti, Investigations in (0-0) Isotopic Bands of the C2 Swan system. J. Mol. Spectrosc. 85, 177188 (1981) |