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\bibitem{Kirsanova_etal2013} {\textquotedblleft}\textit{Synthesis, structure, and transport properties of type-I derived clathrate Ge$_{46-x}$P$_{x}$Se$_{8-y}$ (x=15.4(1), y=0-2.65) with diverse host-guest bonding}{\textquotedblright}. Kirsanova MA, Mori T, Maruyama S, Matveeva, Batuk D, Abakumov AM, Gerasimenko AV, Olenev AV, Grin Y, Shevelkov AV, Inorganic chemistry \textbf{52}, 577 (2013).   http://doi.org/10.1021/ic3011025

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