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\bibitem{Kirsanova_etal2013} {\textquotedblleft}\textit{Cationic clathrate of type-III Ge$_{172-x}$P$_{x}$Te$_{y}$ (y\approx21,5, x\approx2y) : synthesis, crystal structure and thermoelectric properties}{\textquotedblright}. Kirsanova MA, Mori T, Maruyama S, Abakumov AM, Van Tendeloo G, Olenev A, Shevelkov AV, Inorganic chemistry \textbf{52}, 8272 (2013).   http://doi.org/10.1021/ic401203r

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