@ARTICLE{Szeląg-Sikora_Anna_Production_2012, author={Szeląg-Sikora, Anna and Cupiał, Michał}, number={No 2}, journal={Teka Commission of Motorization and Power Industry in Agriculture}, howpublished={online}, year={2012}, publisher={The Lublin Branch of the Polish Academy of Sciences}, title={Production and technical potential of farms united in the selected producer group}, }