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\bibitem{Kolev+Bogaerts2004} {\textquotedblleft}\textit{Numerical models of the planar magnetron glow discharges}{\textquotedblright}. Kolev I, Bogaerts A, Contributions to plasma physics \textbf{44}, 582 (2004).   http://doi.org/10.1002/ctpp.200410085

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