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\bibitem{Somogyi_etal2000} {\textquotedblleft}\textit{Interpretation and use of inter-element correlation graphs obtained by scanning X-ray fluorescence micro-beam spectrometry from individual particles: part 1: theory}{\textquotedblright}. Somogyi A, Janssens K, Vincze L, Vekemans B, Rindby A, Adams F, Spectrochimica acta: part B : atomic spectroscopy \textbf{55}, 75 (2000).   http://doi.org/10.1016/S0584-8547(99)00172-X

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