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\bibitem{Khasanova_etal2002} {\textquotedblleft}\textit{A new structure type of the ternary sulfide Eu$_{1.3}$Nb$_{1.9}$S$_{5}$}{\textquotedblright}. Khasanova NR, Van Tendeloo G, Lebedev OI, Amelinckx S, Grippa AY, Abakumov AM, Istomin SY, D{\textquoteright}yachenko OG, Antipov EV, Journal of solid state chemistry \textbf{164}, 345 (2002).   http://doi.org/10.1006/jssc.2001.9501

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