Saif Ur Rehman, M., Mehmood, S., Ahmad, A., Saeed, A. and Mahmood, T. (2011) “Color and COD Reduction of Biotreated Complex Wastewater using Ozonation Process”, Journal of the Pakistan Institute of Chemical Engineers, 39(1), pp. 81–87. Available at: http://piche.org.pk/journal/index.php/jpiche/article/view/27 (Accessed: 23 July 2024).