Schilter, D., Rauchfuss, T. B., & Stein, M. (2012). Connecting [NiFe]- and [FeFe]-Hydrogenases: Mixed-Valence Nickel-Iron Dithiolates with Rotated Structures. Inorganic Chemistry, 51(16), 8931-8941. doi:10.1021/ic300910r.