Stoyanova, Antonia, Mazharul M. Islam, Galin Borisov, Thomas Bredow, Elefteria Lefterova, and Evelina Slavcheva. 2016. “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 3 (3), 158-65. http://scitecresearch.com/journals/index.php/jprc/article/view/714.