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\bibitem{Spolnik_etal2005} {\textquotedblleft}\textit{Investigation of the chemical composition of (Na$_{1-x}$Bi$_{x}$)(Mn$_{y}$Nb$_{1-y}$)O$_{3}$ ceramics by single particle electron probe X-ray microanalysis with an application of Monte Carlo simulations}{\textquotedblright}. Spolnik Z, Os{\'a}n J, Klepka M, Lawniczak-Jablonska K, Van Grieken R, Molak A, Potgieter JH, Spectrochimica acta: part B : atomic spectroscopy \textbf{60}, 525 (2005).   http://doi.org/10.1016/J.SAB.2005.03.013

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