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Dewar, M.J.S.; Ramsden, C.A., A MINDO/3[modified intermediate neglect of differential overlap] and NDDO [neglect of diatomic differential overlap] study of antiaromatic three- membered rings and their valence tautomers, J. Chem. Soc., Chem. Commun., 1973, No. 18, 688-689. [all data]