1. Faculty of Agriculture, Department of Animal Husbandry Sciences; University of South Bohemia; České Budějovice Czech Republic
2. Faculty of Agriculture, Department of Agricultural Products Quality; University of South Bohemia; České Budějovice Czech Republic
3. Faculty of Science, Institute for Environmental Studies; Charles University of Prague; Prague Czech Republic
4. Faculty of Economics, Department of Applied Mathematics and Informatics; University of South Bohemia; České Budějovice Czech Republic