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\bibitem{Pramanik_etal2018} {\textquotedblleft}\textit{Gold nanoclusters with bright near-infrared photoluminescence}{\textquotedblright}. Pramanik G, Humpolickova J, Valenta J, Kundu P, Bals S, Bour P, Dracinsky M, Cigler P, Nanoscale \textbf{10}, 3792 (2018).   http://doi.org/10.1039/C7NR06050E

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