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\bibitem{vanWalsem_etal2018} {\textquotedblleft}\textit{Determination of intrinsic kinetic parameters in photocatalytic multi-tube reactors by combining the NTU$_{m}$-method with radiation field modelling}{\textquotedblright}. van Walsem J, Roegiers J, Modde B, Lenaerts S, Denys S, Chemical engineering journal \textbf{354}, 1042 (2018).   http://doi.org/10.1016/J.CEJ.2018.08.010

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