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\bibitem{Riva_etal1998} {\textquotedblleft}\textit{Angular momentum transitions and magnetic evaporation in off-center D$^{-}$ centers in quantum well}{\textquotedblright}. Riva C, Schweigert VA, Peeters FM, Physica status solidi: B: basic research \textbf{210}, 599 (1998).   http://doi.org/10.1002/(SICI)1521-3951(199812)210:2<599::AID-PSSB599>3.0.CO;2-M

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