@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://journals.pan.pl/Content/103437/PDF/Archiwum-63-1-05-Korobiichuk.pdf}, doi={10.24425/118886}, keywords={granite, natural stone, compressive strength, tension, velocity of sound}, }