@ARTICLE{Cupiał_Michał_Assumptions_2012, author={Cupiał, Michał and Kowalski, Józef and Szeląg-Sikora, Anna}, 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={Assumptions for collecting information for a module concerning a machinery park of ecological farms in GEKKO programme}, }