Xiao, Zhiyin, et al. “Synthesis, Characterization, Protonation and Electrochemical Investigation of Diiron Tetracarbonyl Complex As a Model of [FeFe]-Hydrogenase”. Asian Journal of Chemistry, vol. 24, no. 1, Sept. 2011, pp. 249-51, https://asianpubs.org/index.php/ajchem/article/view/16007.