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\bibitem{DeBeule_etal2019} {\textquotedblleft}\textit{Crystalline topological states at a topological insulator junction}{\textquotedblright}. De Beule C, Saniz R, Partoens B, The journal of physics and chemistry of solids \textbf{128}, 144 (2019).   http://doi.org/10.1016/J.JPCS.2017.12.027

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