Affiliation: | 1.Institute of Technology and Business in ?eské Budějovice, Okru?ní 517/10, 370 01, ?eské Budějovice, Czech Republic ;2.Faculty of Agriculture (Studentská 1668, University of South Bohemia in ?eské Budějovice, 370 05, ?eské Budějovice, Czech Republic ;3.Faculty of Economics (Studentská 13, University of South Bohemia in ?eské Budějovice, 370 05, ?eské Budějovice, Czech Republic ; |