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\bibitem{NguyenThiTuyet_etal2016} {\textquotedblleft}\textit{Laboratory-scale membrane up-concentration and co-anaerobic digestion for energy recovery from sewage and kitchen waste}{\textquotedblright}. Nguyen Thi Tuyet, Nguyen Phuoc Dan, Nguyen Cong Vu, Nguyen Le Hoang Trung, Bui Xuan Thanh, De Wever H, Goemans M, Diels L, Water science and technology \textbf{73}, 597 (2016).   http://doi.org/10.2166/WST.2015.535

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