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\bibitem{Cukaric_etal2010} {\textquotedblleft}\textit{Electron and hole states in a quantum ring grown by droplet epitaxy. Influence of the layer inside the ring opening}{\textquotedblright}. {\v C}ukari{\'c} N, Tadi{\'c} M, Peeters FM, Superlattices and microstructures \textbf{48}, 491 (2010).   http://doi.org/10.1016/j.spmi.2010.09.001

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