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\bibitem{Trentelman_etal2015} {\textquotedblleft}\textit{Rembrandt{\textquoteright}s An Old Man in Military Costume: the underlying image re-examined}{\textquotedblright}. Trentelman K, Janssens K, van der Snickt G, Szafran Y, Woollett AT, Dik J, Applied physics A : materials science \& processing \textbf{121}, 801 (2015).   http://doi.org/10.1007/S00339-015-9426-3

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