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\bibitem{Chirayath_etal2017} {\textquotedblleft}\textit{Auger electron emission initiated by the creation of valence-band holes in graphene by positron annihilation}{\textquotedblright}. Chirayath VA, Callewaert V, Fairchild AJ, Chrysler MD, Gladen RW, Mcdonald AD, Imam SK, Shastry K, Koymen AR, Saniz R, Barbiellini B, Rajeshwar K, Partoens B, Weiss AH, Nature communications \textbf{8}, 16116 (2017).   http://doi.org/10.1038/ncomms16116

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