Mohammed, A.-H. and Hassan, M. (2002) “Catalytic Reduction of Nitric Oxide in Automobile Exhaust Gases”, Iraqi Journal of Chemical and Petroleum Engineering, 3(2), pp. 7-13. Available at: http://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/622 (Accessed: 30November2019).