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\bibitem{Callewaert_etal2017} {\textquotedblleft}\textit{Application of the weighted-density approximation to the accurate description of electron-positron correlation effects in materials}{\textquotedblright}. Callewaert V, Saniz R, Barbiellini B, Bansil A, Partoens B, Physical review B \textbf{96}, 085135 (2017).   http://doi.org/10.1103/PhysRevB.96.085135

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