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\bibitem{Jacobs_etal1999} {\textquotedblleft}\textit{Nanohardness and structure of nitrogen implanted SixAly coatings post-implanted with oxygen}{\textquotedblright}. Jacobs M, Bodart F, Terwagne G, Schryvers D, Poulet A, Nuclear instruments and methods in physics research: B: beam interactions with materials and atoms \textbf{147}, 231 (1999).   http://doi.org/10.1016/S0168-583X(98)00535-7

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