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\bibitem{Petrov_etal2021} {\textquotedblleft}\textit{Superconductivity in gallenene}{\textquotedblright}. Petrov M, Bekaert J, Milo{\v s}evi{\'c} MV, 2d Materials \textbf{8}, 035056 (2021).   http://doi.org/10.1088/2053-1583/AC0713

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