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\bibitem{Lu_etal2017} {\textquotedblleft}\textit{Toward an understanding of the electric field-induced electrostatic doping in van der Waals heterostructures : a first-principles study}{\textquotedblright}. Lu AKA, Houssa M, Radu IP, Pourtois G, ACS applied materials and interfaces \textbf{9}, 7725 (2017).   http://doi.org/10.1021/ACSAMI.6B14722

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