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\bibitem{Smits_etal2013} {\textquotedblleft}\textit{Photocatalytic degradation of soot deposition : self-cleaning effect on titanium dioxide coated cementitious materials}{\textquotedblright}. Smits M, Chan C kit, Tytgat T, Craeye B, Costarramone N, Lacombe S, Lenaerts S, Chemical engineering journal \textbf{222}, 411 (2013).   http://doi.org/10.1016/J.CEJ.2013.02.089

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