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\bibitem{Yang_etal2012} {\textquotedblleft}\textit{Using self-driven microswimmers for particle separation}{\textquotedblright}. Yang W, Misko VR, Nelissen K, Kong M, Peeters FM, Soft matter \textbf{8}, 5175 (2012).   http://doi.org/10.1039/c2sm07382j

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