Haq, Rizwan Ul, et al. “Experimental Study on Optimization of Chemical Oxygen Demand Reduction through Advanced Oxidation Process for Refinery-Based Oily Sludge in Barmer Rajasthan, India”. EQA - International Journal of Environmental Quality, vol. 67, Jan. 2025, pp. 36-44, doi:10.6092/issn.2281-4485/20955.