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\bibitem{Defoirdt_etal2017} {\textquotedblleft}\textit{Ureolytic activity and its regulation in vibrio campbellii and vibrio harveyi in relation to nitrogen recovery from human urine}{\textquotedblright}. Defoirdt T, Vlaeminck SE, Sun X, Boon N, Clauwaert P, Environmental science and technology \textbf{51}, 13335 (2017).   http://doi.org/10.1021/ACS.EST.7B03829

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