@article{Pukach_P._Influence_2013,
 author={Pukach, P. and Kuzio, I. and Nytrebych, Z.},
 number={No 4},
 howpublished={online},
 journal={ECONTECHMOD},
 year={2013},
 publisher={Lviv Polytechnic National University},
 publisher={Foundry Research Institute in Cracow},
 publisher={Polish Academy of Sciences Branch in Lublin},
 title={Influence of some speed parameters on the dynamicsof nonlinear flexural vibrations of a drill column},
}