Singhal, Kiran, et al. “Synthesis and Characterisation of μ-Oxy-bis[triphenylbismuth(V)] Dicarboxylates and Halo-Carboxylates”. Asian Journal of Chemistry, vol. 26, no. 1, Dec. 2013, pp. 196-00, doi:10.14233/ajchem.2014.15517.