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Finch, A.; Gardner, P.J.; McNamara, P.M.; Wellum, G.R., Cyclic boron compounds. Ring strain in the B-phenyl and B-butyl dioxaboron heterocycles, J. Chem. Soc., A, 1970, 3339, https://doi.org/10.1039/j19700003339 . [all data]