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\bibitem{Hirayama_etal2018} {\textquotedblleft}\textit{Development of a new portable X-ray powder diffractometer and its demonstration to on-site analysis of two selected old master paintings from the Rijksmuseum}{\textquotedblright}. Hirayama A, Abe Y, van Loon A, De Keyser N, Noble P, Vanmeert F, Janssens K, Tantrakarn K, Taniguchi K, Nakai I, Microchemical journal \textbf{138}, 266 (2018).   http://doi.org/10.1016/J.MICROC.2018.01.003

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