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\bibitem{Carvajal-Arroyo_etal2016} {\textquotedblleft}\textit{Biofilms for one-stage autotrophic nitrogen removal}{\textquotedblright}. Carvajal-Arroyo JM, Vitor Akaboci TR, Ruscalleda M, Colprim J, Courtens E, Vlaeminck SE page 205 (2016).

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