Sperling, E.A., Rooney, A.D., Hays, L., Sergeeva, V.N., Vorob’eva, N.G., Sergeeva, N.D., Pearson, A., Selby, D., Johnston, D.T., Knoll, A.H., "Redox heterogeneity of subsurface waters in the Mesoproterozoic ocean", Geobiology, 2014