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Calabro, D.C.; Hubbard, J.L.; Blevins, C.H., II; Campbell, A.C.; Lichtenberger, D.L., The effects of methyl group substitution on metal-coordinated cyclopentadienyl rings. The core and valence ionizations of methylated tricarbonyl(«eta»5-cyclopentadienyl)metal complexes, J. Am. Chem. Soc., 1981, 103, 6839. [all data]