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\bibitem{Nelissen_etal2004} {\textquotedblleft}\textit{Influence of a defect particle on the structure of a classical two-dimensional cluster}{\textquotedblright}. Nelissen K, Partoens B, Peeters FM, Physical review : E : statistical physics, plasmas, fluids, and related interdisciplinary topics \textbf{69}, 046605 (2004).   http://doi.org/10.1103/PhysRevE.69.046605

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