@ARTICLE{Sędłak_Paweł_Characteristic_2012,
 author={Sędłak, Paweł and Koniuszy, Adam and Stawicki, Tomasz},
 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={Characteristic load states of a tractor engine under farm operating conditions},
}