W. Aditama, S. Sofia, J. Junaidi, and Z. Zulfikar, “Optimization of the Use of Chinese Teak Seed Powder Coagulant (Cassia angustifolia) as a Natural Coagulant in Reducing Turbidity of Dug Well Water Using the Jar Test Method”, Open Access Maced J Med Sci, vol. 10, no. E, pp. 662–666, Apr. 2022.