Malik, S. R., M. A. Maqbool, and J. R. Khan. “AIR POLLUTION CONTROL TECHNIQUES & A CASE STUDY OF INDUSTRIAL AIR EMISSIONS”. The Nucleus, vol. 46, no. 3, June 2020, pp. 187-95, http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/945.