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Hameed, Yasir Talib; Idris, Azni; Hussain, Siti Aslina; Abdullah, Norhafizah . (2016). A tannin-based agent for coagulation and flocculation of municipal wastewater: Chemical composition, performance assessment compared to Polyaluminum chloride, and application in a pilot plant. Journal of Environmental Management, (), S0301479716308179–. doi:10.1016/j.jenvman.2016.10.033 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research