@article{Ryś-Jurek_2008, title={ł The Output of the Average Individual Farm in Poland and in the European Union Countries. An Attempt of Defining Similarity of Structures in 2005}, volume={8}, url={http://www1.up.poznan.pl/jard/index.php/jard/article/view/915}, number={2}, journal={Journal of Agribusiness and Rural Development}, author={Ryś-Jurek, Roma}, year={2008}, month={Dec.}, pages={119-133}