Mohammed, Wadood T. “Improving the Activity of NiO-NiFe2 Catalyst by Na2O for Phenol Synthesis”. Iraqi Journal of Chemical and Petroleum Engineering 5, no. 2 (June 30, 2004): 49–52. Accessed November 22, 2024. https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/685.