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\bibitem{Buytaert_etal2011} {\textquotedblleft}\textit{Towards integrated sustainability assessment for energetic use of biomass : a state of the art evaluation of assessment tools}{\textquotedblright}. Buytaert V, Muys B, Devriendt N, Pelkmans L, Kretzschmar JG, Samson R, Renewable and sustainable energy reviews \textbf{15}, 3918 (2011).   http://doi.org/10.1016/J.RSER.2011.07.036

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