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\bibitem{Geurts_etal2007} {\textquotedblleft}\textit{Stabilization of vortex-antivortex configurations in mesoscopic superconductors by engineered pinning}{\textquotedblright}. Geurts R, Milo{\v s}evi{\'c} MV, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{75}, 184511 (2007).   http://doi.org/10.1103/PhysRevB.75.184511

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