Mohammed, Malik, Mahmood Barbuti, Raad Rashid, and Hind Muneer. “Removal of Sulfur Dioxide from Sulfuric Acid Plant Emissions”. Iraqi Journal of Chemical and Petroleum Engineering 3, no. 2 (June 30, 2002): 31-34. Accessed November 30, 2019. http://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/625.