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\bibitem{Osan_etal2001} {\textquotedblleft}\textit{Application of chemometric methods for classification of atmospheric particles based on thin-window electron probe microanalysis data}{\textquotedblright}. Os{\'a}n J, de Hoog J, Worobiec A, Ro C-U, Oh K-Y, Szal{\'o}ki I, Van Grieken R, Analytica chimica acta \textbf{446}, 211 (2001)

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