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\bibitem{Bojar_etal2016} Bojar, W., Knopik, L., {\.Z}arski, J., \& Ku{\'s}mierek-Tomaszewska, R. (2016). Integrated assessment of crop productivity based on the food supply forecasting. \textit{Agricultural Economics {\textendash} Czech}, \textit{61}(11), 502--510.

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