Hougen, J.
and Wiersma, G.
(2001),
The Calculation of Rotational Energy Levels and Rotational Line Intensities in Diatomic Molecules, Monograph (NIST MN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NBS.MONO.115
(Accessed October 11, 2024)