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McNaughton, D.; Robertson, E.G.; Hatherley, L.D., Resonance between the Ground Vibrational State and the Lowest Frequency Bending Mode of Thioketene, J. Mol. Spectrosc., 1996, 175, 2, 377, https://doi.org/10.1006/jmsp.1996.0043 . [all data]