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\bibitem{Christis_etal2017} {\textquotedblleft}\textit{Improving footprint calculations of small open economies : combining local with multi-regional input-output tables}{\textquotedblright}. Christis M, Geerken T, Vercalsteren A, Vrancken KCM, Economic systems research \textbf{29}, 25 (2017).   http://doi.org/10.1080/09535314.2016.1245653

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