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\bibitem{Hillen_etal2020} {\textquotedblleft}\textit{Cluster analysis of IR thermography data for differentiating glass types in historical leaded-glass windows}{\textquotedblright}. Hillen M, Legrand S, Dirkx Y, Janssens K, van der Snickt G, Caen J, Steenackers G, Applied Sciences-Basel \textbf{10}, 4255 (2020).   http://doi.org/10.3390/APP10124255

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