RT Journal Article SR Electronic A1 Kovalyshyn, Stepan A1 Kovalyshyn, Oleksanda T1 JF Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis YR 2018 VO 66 IS 5 SP 1157 OP 1164 DO 10.11118/actaun201866051157 UL https://acta.mendelu.cz/artkey/acu-201805-0008.php AB