This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Katarzyna Utnik-Banaś
Department of Management and Marketing in Agribusiness, University of Agriculture in Krakow, Al. Mickiewicza 21, 31-120 Kraków, Poland
Janusz Żmija
Department of Management and Marketing in Agribusiness, University of Agriculture in Krakow, Al. Mickiewicza 21, 31-120 Kraków, Poland
Elżbieta Sowula-Skrzyñska
Department of Technology, Ecology and Economics of Animal Production, National Research Institute of Animal Production, 32-083 Balice n. Kraków, Poland