@misc{Wesołowski_Z._Wave_1991,
 author={Wesołowski, Z.},
 volume={43},
 number={2-3},
 copyright={Creative Commons Attribution BY 4.0 license},
 journal={Archives of Mechanics},
 address={Warszawa},
 howpublished={online},
 year={1991},
 publisher={Polish Scientific Publishers IFTR},
 language={eng},
 title={Wave speed in periodic elastic layers},
 type={Text},
 URL={http://rcin.org.pl/ippt/Content/69933/PDF/WA727_18046_43-2-3-1991_AMS_Wesolowski-08.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}