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Pelz, G.; Yamada, K.M.T.; Winnewisser, G., Torsional Dependence of the Effective Rotational Constants of H2O2 and H2S2, J. Mol. Spectrosc., 1993, 159, 2, 507, https://doi.org/10.1006/jmsp.1993.1146 . [all data]