Stoyanova, A., M. M. Islam, G. Borisov, T. Bredow, E. Lefterova, and E. Slavcheva. “Effect of Partial Replacement of Pt-Based Catalysts With Fe- and Co-for Oxygen Evolution Reaction in Pem Water Electrolysis: A Combined Theoretical and Experimental Study”. Journal of Progressive Research in Chemistry, Vol. 3, no. 3, May 2016, pp. 158-65, http://scitecresearch.com/journals/index.php/jprc/article/view/714.