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\bibitem{vanWinsen_etal2013} {\textquotedblleft}\textit{Cognitive mapping : a method to elucidate and present farmers{\textquoteright} risk perception}{\textquotedblright}. van Winsen F, de Mey Y, Lauwers L, Van Passel S, Vancauteren M, Wauters E, Agricultural Systems \textbf{122}, 42 (2013).   http://doi.org/10.1016/J.AGSY.2013.08.003

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