Quality and Leading Innovation IV. Proceedings from the International Scientific Conference : 25th - 28th September 2018, Košice, Uzhgorod - Lacko, Roman, 1988-; Mitrová, Miriam, 1975-; Hudák, Matej, 1984-; Tkáč, Michal, 1958-; Jakub, Vincent (University of Economics, Faculty of Business Economics with Seat in Košice, 2018)