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\bibitem{Beltran_etal2021} {\textquotedblleft}\textit{Geranium lake pigments : the role of the synthesis on the structure and composition}{\textquotedblright}. Beltran V, Marchetti A, De Meyer S, Nuyts G, De Wael K, Dyes And Pigments \textbf{189}, 109260 (2021).   http://doi.org/10.1016/J.DYEPIG.2021.109260

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