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\bibitem{Neek-Amal_etal2013} {\textquotedblleft}\textit{Electronic structure of a hexagonal graphene flake subjected to triaxial stress}{\textquotedblright}. Neek-Amal M, Covaci L, Shakouri K, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{88}, 115428 (2013).   http://doi.org/10.1103/PhysRevB.88.115428

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