Marketing management, trade, financial and social aspects of business conference proceedings of the 4th international scientific conference : october 20 - 21, 2016, Košice, Slovak Republic - Olexová, Cecília, 1976-; Janošková, Mária, 1965-; Lisnik, Anton; Socha, Luboš; Socha, Vladimír (Faculty of Business Economics with seat in Košice, 2016)