Al-Hemiri, Adil A, Ghazi F Nejmaldin, and Wadood T Mohammed. 2002. “Vapor Phase Oxidation of Benzoic Acid to Phenol Using Nickel-Iron Oxides Catalysts”. Iraqi Journal of Chemical and Petroleum Engineering 3 (4): 13-18. https://doi.org/10.31699/IJCPE.2002.4.3.