J. R. Cheeseman, M. J. Frisch, F. J. Devlin, and P. J. Stephens, “Ab Initio Calculation of Atomic Axial Tensors and Vibrational Rotational Strengths Using Density Functional Theory,” Chem. Phys. Lett., 252 (1996) 211-20. DOI: 10.1016/0009-2614(96)00154-6
