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\bibitem{Kolev+Bogaerts2006} {\textquotedblleft}\textit{Detailed numerical investigation of a DC sputter magnetron}{\textquotedblright}. Kolev I, Bogaerts A, IEEE transactions on plasma science \textbf{34}, 886 (2006).   http://doi.org/10.1109/TPS.2006.875843

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