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\bibitem{Zhang_etal2012} {\textquotedblleft}\textit{Unconventional vortex states in nanoscale superconductors due to shape-induced resonances in the inhomogeneous Cooper-pair condensate}{\textquotedblright}. Zhang L-F, Covaci L, Milo{\v s}evi{\'c} MV, Berdiyorov GR, Peeters FM, Physical review letters \textbf{109}, 107001 (2012).   http://doi.org/10.1103/PhysRevLett.109.107001

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