ICYS 2019 [elektronický zdroj] : proceedings of the XXI International conference of young scientists, Nitra 2019 / editors Vlasta Vozárová, Ana Petrovič . Nitra :  Slovak University of Agriculture , 2019 . 1 CD-ROM (162 s) . ISBN 978-80-552-2003-1 . [3, of that borrowed 0]