@misc{Kostek_Robert_An,
 author={Kostek, Robert},
 howpublished={online},
 publisher={Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej},
 language={eng},
 type={artykuł},
 title={An analysis of the primary and superharmonic contact resonances - part 2},
 keywords={multi-stability, non-linear contact, superharmonic resonance, vibrations},
}