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\bibitem{Ferreira_etal2005} {\textquotedblleft}\textit{Melting and evaporation in classical two-dimensional clusters confined by a Coulomb potential}{\textquotedblright}. Ferreira WP, Peeters FM, Farias GA, Physical review : E : statistical, nonlinear, and soft matter physics \textbf{72}, 041502 (2005).   http://doi.org/10.1103/PhysRevE.72.041502

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