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\bibitem{Hu_etal2018} {\textquotedblleft}\textit{Effect of diclofenac on the production of volatile fatty acids from anaerobic fermentation of waste activated sludge}{\textquotedblright}. Hu J, Zhao J, Wang D, Li X, Zhang D, Xu Q, Peng L, Yang Q, Zeng G, Bioresource technology \textbf{254}, 7 (2018).   http://doi.org/10.1016/J.BIORTECH.2018.01.059

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