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\bibitem{Bafekry_etal2020} {\textquotedblleft}\textit{A first-principles study of the effects of atom impurities, defects, strain, electric field and layer thickness on the electronic and magnetic properties of the C2N nanosheet}{\textquotedblright}. Bafekry A, Stampfl C, Ghergherehchi M, Shayesteh SF, Carbon \textbf{157}, 371 (2020).   http://doi.org/10.1016/J.CARBON.2019.10.038

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