Leung, P., Shah, A.A., Sanz, L., Flox, C., Morante, J.R., Xu, Q., Mohamed, M.R., Ponce de León, C., Walsh, F.C. "Recent developments in organic redox flow batteries: A critical review" Journal of Power Sources 360, pp. 243 - 283. 2017 DOI: 10.1016/j.jpowsour.2017.05.057