@misc{Sochacki_Wojciech_Damped,
 author={Sochacki Wojciech and Bold Marta},
 howpublished={online},
 publisher={Wydaw. Politechniki Częstochowskiej},
 language={eng},
 type={czasopismo},
 title={Damped vibration of the system of changing the crane boom radius},
 keywords={truck crane, damped vibration, eingenvalues},
}