@misc{Ciekot_Anita_Free,
 author={Ciekot, Anita and Kukla Stanisław},
 howpublished={online},
 publisher={Wydaw. Politechniki Częstochowskiej},
 language={eng},
 type={czasopismo},
 title={Free vibration to a system of cantilever nanobeams},
 keywords={cantilever nanobeams, free vibration, Green's function method},
}