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\bibitem{Govaerts_etal2014} {\textquotedblleft}\textit{Homologous series of layered structures in binary and ternary Bi-Sb-Te-Se systems : ab initio study}{\textquotedblright}. Govaerts K, Sluiter MHF, Partoens B, Lamoen D, Physical review : B : condensed matter and materials physics \textbf{89}, 054106 (2014).   http://doi.org/10.1103/PhysRevB.89.054106

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