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\bibitem{Pandey_etal2021} {\textquotedblleft}\textit{Flexoelectricity and transport properties of phosphorene nanoribbons under mechanical bending}{\textquotedblright}. Pandey T, Covaci L, Milo{\v s}evi{\'c} MV, Peeters FM, Physical Review B \textbf{103}, 235406 (2021).   http://doi.org/10.1103/PHYSREVB.103.235406

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