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\bibitem{Pacini_etal2015} {\textquotedblleft}\textit{Increasing the cost-effectiveness of EU agri-environment policy measures through evaluation of farm and field-level environmental and economic performance}{\textquotedblright}. Pacini GC, Merante P, Lazzerini G, Van Passel S, Agricultural Systems \textbf{136}, 70 (2015).   http://doi.org/10.1016/J.AGSY.2015.02.004

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