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\bibitem{Szafran_etal2005} {\textquotedblleft}\textit{Exciton and negative trion dissociation by an external electric field in vertically coupled quantum dots}{\textquotedblright}. Szafran B, Chwiej T, Peeters FM, Bednarek S, Adamowski J, Partoens B, Physical review : B : condensed matter and materials physics \textbf{71}, 205316 (2005).   http://doi.org/10.1103/PhysRevB.71.205316

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