@ARTICLE{Szewczyk_Roman_INVESTIGATION_2018,
 author={Szewczyk, Roman and Korobiichuk, Igor and Korobiichuk, Valentyn and PETR HÁJEK and PAVEL KOKEŠ and Juś, Andrzej},
 volume={vol. 63},
 number={No 1},
 journal={Archives of Mining Sciences},
 howpublished={online},
 year={2018},
 publisher={Committee of Mining PAS},
 type={Artykuły / Articles},
 title={INVESTIGATION OF LEZNIKOVSKIY GRANITE BY ULTRASONIC METHODS},
 URL={http://ochroma.man.poznan.pl/Content/103437/PDF/Archiwum-63-1-05-Korobiichuk.pdf},
 doi={10.24425/118886},
 keywords={granite, natural stone, compressive strength, tension, velocity of sound},
}