Basibuyuk, Mesut, Selmin Unlu, and Demet Gundogan Kalat. 2010. “Use of Waterworks Sludge, Ferric Chloride and Alum for the Treatment of Papermill Wastewater”. Asian Journal of Chemistry 16 (1):103-12. https://asianpubs.org/index.php/ajchem/article/view/19537.