Gao, Wei, et al. “Synthesis and Structural Characterization of Diiron Dithiolate Complex [(ΜSCH2)2NCH2PhFe2(CO)5][(h5-Ph2PC5H4)2Fe] Containing Diphosphine Ligand”. Asian Journal of Chemistry, vol. 26, no. 7, Mar. 2014, pp. 2089-91, doi:10.14233/ajchem.2014.16183B.