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\bibitem{Arsoski_etal2015} {\textquotedblleft}\textit{An efficient finite-difference scheme for computation of electron states in free-standing and core-shell quantum wires}{\textquotedblright}. Arsoski VV, {\v C}ukari{\'c} NA, Tadic MZ, Peeters FM, Computer physics communications \textbf{197}, 17 (2015).   http://doi.org/10.1016/j.cpc.2015.08.002

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