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\bibitem{Riva_etal1998} {\textquotedblleft}\textit{Off-center D$^{-}$ centers in a quantum well in the presence of a perpendicular magnetic field: angular momentum transition and magnetic evaporation}{\textquotedblright}. Riva C, Schweigert VA, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{57}, 15392 (1998).   http://doi.org/10.1103/PhysRevB.57.15392

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