Yang, Yu-Hua, et al. “Synthesis and Crystal Structure of Trinuclear Ni(II) Complex With 5-Methoxy-4’-Bromo-2,2’-[ethylenedioxybis(nitrilomethylidyne)]diphenol”. Asian Journal of Chemistry, vol. 26, no. 1, Dec. 2013, pp. 269-72, doi:10.14233/ajchem.2014.15867.