@ARTICLE{Sędłak_Paweł_The_2012, author={Sędłak, Paweł and Janicki, Wiesław and Matuszak, Krzysztof}, number={No 1}, 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={The analysis of the usability of selected stationary load cycles for the assessment of the tractor engine economy}, }