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\bibitem{Foeldi_etal2009} {\textquotedblleft}\textit{Stability of spintronic devices based on quantum ring networks}{\textquotedblright}. F{\"o}ldi P, K{\'a}lm{\'a}n O, Peeters FM, Physical review : B : solid state \textbf{80}, 125324 (2009).   http://doi.org/10.1103/PhysRevB.80.125324

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