Spectroscopic constants of spherical top molecules. q2 J2 and q 2 J3 terms for interacting states 1000, 0010 and 0100, 0001 of ab4 molecules V.I. Perevalov, Vl. G. Tyuterev et B.I. ZhilinskiiJ. Phys. France, 43 5 (1982) 723-728DOI: https://doi.org/10.1051/jphys:01982004305072300
