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\bibitem{Deyneko_etal2015} {\textquotedblleft}\textit{A novel red Ca$_{8.5}$Pb$_{0.5}$Eu(PO$_{4}$)$_{7}$ phosphor for light emitting diodes application}{\textquotedblright}. Deyneko DV, Morozov VA, Hadermann J, Savon AE, Spassky DA, Stefanovich SY, Belik AA, Lazoryak BI, Journal of alloys and compounds \textbf{647}, 965 (2015).   http://doi.org/10.1016/j.jallcom.2015.06.123

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