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\bibitem{Kindratenko_etal1994} {\textquotedblleft}\textit{Fractal dimensional classification of aerosol particles by computer-controlled scanning electron microscopy}{\textquotedblright}. Kindratenko VV, van Espen PJM, Treiger BA, Van Grieken RE, Environmental science and technology \textbf{28}, 2197 (1994).   http://doi.org/10.1021/ES00061A031

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