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\bibitem{Bafekry_etal2020} {\textquotedblleft}\textit{Embedding of atoms into the nanopore sites of the C$_{6}$N$_{6}$ and C$_{6}$N$_{8}$ porous carbon nitride monolayers with tunable electronic properties}{\textquotedblright}. Bafekry A, Stampfl C, Akgenc B, Mortazavi B, Ghergherehchi M, Nguyen CV, Physical Chemistry Chemical Physics \textbf{22}, 6418 (2020).   http://doi.org/10.1039/D0CP00093K

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