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\bibitem{Cagno_etal2011} {\textquotedblleft}\textit{The browning of stained glass windows : characterization of Mn-corrosion bodies and evaluation of cleaning methods}{\textquotedblright}. Cagno S, Nuyts G, De Vis K, Caen J, Van Mol W, Bongaers E, Pauwels B, Janssens K,  (2011)

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