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\bibitem{Nelissen_etal2007} {\textquotedblleft}\textit{Dynamics of topological defects and the effects of the cooling rate on finite-size two-dimensional screened Coulomb clusters}{\textquotedblright}. Nelissen K, Partoens B, Peeters FM, Europhysics letters \textbf{79}, 66001 (2007).   http://doi.org/10.1209/0295-5075/79/66001

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