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\bibitem{Janssens_etal2001} {\textquotedblleft}\textit{Magnetic field dependence of the exciton energy in a quantum disk}{\textquotedblright}. Janssens KL, Peeters FM, Schweigert VA, Physical review : B : condensed matter and materials physics \textbf{63}, 205311 (2001).   http://doi.org/10.1103/PhysRevB.63.205311

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