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\bibitem{Kontozova-Deutsch_etal2011} {\textquotedblleft}\textit{Urban air pollutants and their micro effects on medieval stained glass windows}{\textquotedblright}. Kontozova-Deutsch V, Deutsch F, Godoi RHM, Van Grieken R, De Wael K, Microchemical journal \textbf{99}, 508 (2011).   http://doi.org/10.1016/J.MICROC.2011.07.003

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