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\bibitem{VanPottelberge_etal2019} {\textquotedblleft}\textit{Molecular collapse in monolayer graphene}{\textquotedblright}. Van Pottelberge R, Moldovan D, Milovanovi{\'c} SP, Peeters FM, 2D materials \textbf{6}, 045047 (2019).   http://doi.org/10.1088/2053-1583/AB3FEB

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