Bunker, P.R. (2025). "The Molecular Symmetry Group; A Personal View of the History of its Development". Natural Sciences. 5 (1–2): e20240036. doi:10.1002/ntls.20240036.
Schnell, M. (2010). "Understanding High-Resolution Spectra of Nonrigid Molecules Using Group Theory". ChemPhysChem. 11 (4): 750–780. doi:10.1002/cphc.200900760. PMID20213775.
Oldani, M.; et al. (1985). "Pure rotational spectra of methane and methane-d4 in the vibrational ground state observed by microwave Fourier transform spectroscopy". Journal of Molecular Spectroscopy. 110 (1): 93–105. Bibcode:1985JMoSp.110...93O. doi:10.1016/0022-2852(85)90215-2.
Oldani, M.; et al. (1985). "Pure rotational spectra of methane and methane-d4 in the vibrational ground state observed by microwave Fourier transform spectroscopy". Journal of Molecular Spectroscopy. 110 (1): 93–105. Bibcode:1985JMoSp.110...93O. doi:10.1016/0022-2852(85)90215-2.
Schnell, M. (2010). "Understanding High-Resolution Spectra of Nonrigid Molecules Using Group Theory". ChemPhysChem. 11 (4): 750–780. doi:10.1002/cphc.200900760. PMID20213775.